Home / 20,748.80-31,108.08-14,154.32

Finding the Fourth Proportional to 20,748.80, 31,108.08 and 14,154.32

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Solution

The fourth proportional to 20,748.80, 31,108.08 and 14,154.32 is: 21,221.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,748.80 : 31,108.08 = 14,154.32 : x
  2. Step 2: Convert to fraction form
    20,748.80/31,108.08 = 14,154.32/x
  3. Step 3: Cross multiply
    20,748.80x = 31,108.08 × 14,154.32
  4. Step 4: Simplify right side
    20,748.80x = 440,313,718.91
  5. Step 5: Solve for x
    x = 440,313,718.91/20,748.80
  6. Step 6: Final answer
    x = 21,221.17

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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.