Home / 20,117.61-30,186.15-8,280.12

Finding the Fourth Proportional to 20,117.61, 30,186.15 and 8,280.12

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Solution

The fourth proportional to 20,117.61, 30,186.15 and 8,280.12 is: 12,424.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,117.61 : 30,186.15 = 8,280.12 : x
  2. Step 2: Convert to fraction form
    20,117.61/30,186.15 = 8,280.12/x
  3. Step 3: Cross multiply
    20,117.61x = 30,186.15 × 8,280.12
  4. Step 4: Simplify right side
    20,117.61x = 249,944,944.34
  5. Step 5: Solve for x
    x = 249,944,944.34/20,117.61
  6. Step 6: Final answer
    x = 12,424.19

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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.