Home / 30,711.62-45,981.88-15,686.20

Finding the Fourth Proportional to 30,711.62, 45,981.88 and 15,686.20

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Solution

The fourth proportional to 30,711.62, 45,981.88 and 15,686.20 is: 23,485.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,711.62 : 45,981.88 = 15,686.20 : x
  2. Step 2: Convert to fraction form
    30,711.62/45,981.88 = 15,686.20/x
  3. Step 3: Cross multiply
    30,711.62x = 45,981.88 × 15,686.20
  4. Step 4: Simplify right side
    30,711.62x = 721,280,966.06
  5. Step 5: Solve for x
    x = 721,280,966.06/30,711.62
  6. Step 6: Final answer
    x = 23,485.60

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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.