Home / 28,129.30-42,145.35-13,306.30

Finding the Fourth Proportional to 28,129.30, 42,145.35 and 13,306.30

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Solution

The fourth proportional to 28,129.30, 42,145.35 and 13,306.30 is: 19,936.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129.30 : 42,145.35 = 13,306.30 : x
  2. Step 2: Convert to fraction form
    28,129.30/42,145.35 = 13,306.30/x
  3. Step 3: Cross multiply
    28,129.30x = 42,145.35 × 13,306.30
  4. Step 4: Simplify right side
    28,129.30x = 560,798,670.71
  5. Step 5: Solve for x
    x = 560,798,670.71/28,129.30
  6. Step 6: Final answer
    x = 19,936.46

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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.