Home / 20,531.04-28,337.23-12,972.57

Finding the Fourth Proportional to 20,531.04, 28,337.23 and 12,972.57

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Solution

The fourth proportional to 20,531.04, 28,337.23 and 12,972.57 is: 17,904.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.04 : 28,337.23 = 12,972.57 : x
  2. Step 2: Convert to fraction form
    20,531.04/28,337.23 = 12,972.57/x
  3. Step 3: Cross multiply
    20,531.04x = 28,337.23 × 12,972.57
  4. Step 4: Simplify right side
    20,531.04x = 367,606,699.78
  5. Step 5: Solve for x
    x = 367,606,699.78/20,531.04
  6. Step 6: Final answer
    x = 17,904.92

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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.