Home / 12,521.18-18,781.85-5,125.63

Finding the Fourth Proportional to 12,521.18, 18,781.85 and 5,125.63

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Solution

The fourth proportional to 12,521.18, 18,781.85 and 5,125.63 is: 7,688.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,521.18 : 18,781.85 = 5,125.63 : x
  2. Step 2: Convert to fraction form
    12,521.18/18,781.85 = 5,125.63/x
  3. Step 3: Cross multiply
    12,521.18x = 18,781.85 × 5,125.63
  4. Step 4: Simplify right side
    12,521.18x = 96,268,800.48
  5. Step 5: Solve for x
    x = 96,268,800.48/12,521.18
  6. Step 6: Final answer
    x = 7,688.48

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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.