Home / 15,402.71-21,255.73-8,688.32

Finding the Fourth Proportional to 15,402.71, 21,255.73 and 8,688.32

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Solution

The fourth proportional to 15,402.71, 21,255.73 and 8,688.32 is: 11,989.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,402.71 : 21,255.73 = 8,688.32 : x
  2. Step 2: Convert to fraction form
    15,402.71/21,255.73 = 8,688.32/x
  3. Step 3: Cross multiply
    15,402.71x = 21,255.73 × 8,688.32
  4. Step 4: Simplify right side
    15,402.71x = 184,676,584.07
  5. Step 5: Solve for x
    x = 184,676,584.07/15,402.71
  6. Step 6: Final answer
    x = 11,989.88

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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.