Home / 38,688.88-53,395.06-21,697.68

Finding the Fourth Proportional to 38,688.88, 53,395.06 and 21,697.68

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Solution

The fourth proportional to 38,688.88, 53,395.06 and 21,697.68 is: 29,945.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,688.88 : 53,395.06 = 21,697.68 : x
  2. Step 2: Convert to fraction form
    38,688.88/53,395.06 = 21,697.68/x
  3. Step 3: Cross multiply
    38,688.88x = 53,395.06 × 21,697.68
  4. Step 4: Simplify right side
    38,688.88x = 1,158,548,925.46
  5. Step 5: Solve for x
    x = 1,158,548,925.46/38,688.88
  6. Step 6: Final answer
    x = 29,945.27

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.