Home / 28,387.51-39,145.06-21,206.17

Finding the Fourth Proportional to 28,387.51, 39,145.06 and 21,206.17

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Solution

The fourth proportional to 28,387.51, 39,145.06 and 21,206.17 is: 29,242.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,387.51 : 39,145.06 = 21,206.17 : x
  2. Step 2: Convert to fraction form
    28,387.51/39,145.06 = 21,206.17/x
  3. Step 3: Cross multiply
    28,387.51x = 39,145.06 × 21,206.17
  4. Step 4: Simplify right side
    28,387.51x = 830,116,797.02
  5. Step 5: Solve for x
    x = 830,116,797.02/28,387.51
  6. Step 6: Final answer
    x = 29,242.33

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Half scale
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Double scale
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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.