Home / 21,337.12-29,437-13,365.48

Finding the Fourth Proportional to 21,337.12, 29,437 and 13,365.48

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Solution

The fourth proportional to 21,337.12, 29,437 and 13,365.48 is: 18,439.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,337.12 : 29,437 = 13,365.48 : x
  2. Step 2: Convert to fraction form
    21,337.12/29,437 = 13,365.48/x
  3. Step 3: Cross multiply
    21,337.12x = 29,437 × 13,365.48
  4. Step 4: Simplify right side
    21,337.12x = 393,439,634.76
  5. Step 5: Solve for x
    x = 393,439,634.76/21,337.12
  6. Step 6: Final answer
    x = 18,439.21

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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.