Home / 21,699.36-29,928.69-15,750.72

Finding the Fourth Proportional to 21,699.36, 29,928.69 and 15,750.72

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Solution

The fourth proportional to 21,699.36, 29,928.69 and 15,750.72 is: 21,724.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,699.36 : 29,928.69 = 15,750.72 : x
  2. Step 2: Convert to fraction form
    21,699.36/29,928.69 = 15,750.72/x
  3. Step 3: Cross multiply
    21,699.36x = 29,928.69 × 15,750.72
  4. Step 4: Simplify right side
    21,699.36x = 471,398,416.16
  5. Step 5: Solve for x
    x = 471,398,416.16/21,699.36
  6. Step 6: Final answer
    x = 21,724.07

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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.