Home / 15,580.32-21,446.28-13,587.36

Finding the Fourth Proportional to 15,580.32, 21,446.28 and 13,587.36

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Solution

The fourth proportional to 15,580.32, 21,446.28 and 13,587.36 is: 18,702.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,580.32 : 21,446.28 = 13,587.36 : x
  2. Step 2: Convert to fraction form
    15,580.32/21,446.28 = 13,587.36/x
  3. Step 3: Cross multiply
    15,580.32x = 21,446.28 × 13,587.36
  4. Step 4: Simplify right side
    15,580.32x = 291,398,327.02
  5. Step 5: Solve for x
    x = 291,398,327.02/15,580.32
  6. Step 6: Final answer
    x = 18,702.97

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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.