Home / 18,721.60-28,082.40-8,880.10

Finding the Fourth Proportional to 18,721.60, 28,082.40 and 8,880.10

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Solution

The fourth proportional to 18,721.60, 28,082.40 and 8,880.10 is: 13,320.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.60 : 28,082.40 = 8,880.10 : x
  2. Step 2: Convert to fraction form
    18,721.60/28,082.40 = 8,880.10/x
  3. Step 3: Cross multiply
    18,721.60x = 28,082.40 × 8,880.10
  4. Step 4: Simplify right side
    18,721.60x = 249,374,520.24
  5. Step 5: Solve for x
    x = 249,374,520.24/18,721.60
  6. Step 6: Final answer
    x = 13,320.15

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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.