Home / 28,018.20-42,031.08-9,291.72

Finding the Fourth Proportional to 28,018.20, 42,031.08 and 9,291.72

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Solution

The fourth proportional to 28,018.20, 42,031.08 and 9,291.72 is: 13,938.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,018.20 : 42,031.08 = 9,291.72 : x
  2. Step 2: Convert to fraction form
    28,018.20/42,031.08 = 9,291.72/x
  3. Step 3: Cross multiply
    28,018.20x = 42,031.08 × 9,291.72
  4. Step 4: Simplify right side
    28,018.20x = 390,541,026.66
  5. Step 5: Solve for x
    x = 390,541,026.66/28,018.20
  6. Step 6: Final answer
    x = 13,938.83

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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.