Home / 21,515.80-29,675.36-15,567.16

Finding the Fourth Proportional to 21,515.80, 29,675.36 and 15,567.16

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Solution

The fourth proportional to 21,515.80, 29,675.36 and 15,567.16 is: 21,470.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,515.80 : 29,675.36 = 15,567.16 : x
  2. Step 2: Convert to fraction form
    21,515.80/29,675.36 = 15,567.16/x
  3. Step 3: Cross multiply
    21,515.80x = 29,675.36 × 15,567.16
  4. Step 4: Simplify right side
    21,515.80x = 461,961,041.91
  5. Step 5: Solve for x
    x = 461,961,041.91/21,515.80
  6. Step 6: Final answer
    x = 21,470.78

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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.