Home / 21,291.08-29,399.46-15,657.32

Finding the Fourth Proportional to 21,291.08, 29,399.46 and 15,657.32

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Solution

The fourth proportional to 21,291.08, 29,399.46 and 15,657.32 is: 21,620.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291.08 : 29,399.46 = 15,657.32 : x
  2. Step 2: Convert to fraction form
    21,291.08/29,399.46 = 15,657.32/x
  3. Step 3: Cross multiply
    21,291.08x = 29,399.46 × 15,657.32
  4. Step 4: Simplify right side
    21,291.08x = 460,316,753.05
  5. Step 5: Solve for x
    x = 460,316,753.05/21,291.08
  6. Step 6: Final answer
    x = 21,620.17

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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.