Home / 20,729.28-31,108.48-9,045.84

Finding the Fourth Proportional to 20,729.28, 31,108.48 and 9,045.84

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Solution

The fourth proportional to 20,729.28, 31,108.48 and 9,045.84 is: 13,575.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.28 : 31,108.48 = 9,045.84 : x
  2. Step 2: Convert to fraction form
    20,729.28/31,108.48 = 9,045.84/x
  3. Step 3: Cross multiply
    20,729.28x = 31,108.48 × 9,045.84
  4. Step 4: Simplify right side
    20,729.28x = 281,402,332.72
  5. Step 5: Solve for x
    x = 281,402,332.72/20,729.28
  6. Step 6: Final answer
    x = 13,575.11

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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.