Home / 13,809.80-20,712.57-7,572.89

Finding the Fourth Proportional to 13,809.80, 20,712.57 and 7,572.89

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Solution

The fourth proportional to 13,809.80, 20,712.57 and 7,572.89 is: 11,358.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,809.80 : 20,712.57 = 7,572.89 : x
  2. Step 2: Convert to fraction form
    13,809.80/20,712.57 = 7,572.89/x
  3. Step 3: Cross multiply
    13,809.80x = 20,712.57 × 7,572.89
  4. Step 4: Simplify right side
    13,809.80x = 156,854,037.61
  5. Step 5: Solve for x
    x = 156,854,037.61/13,809.80
  6. Step 6: Final answer
    x = 11,358.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.