Home / 10,123.76-15,187.68-4,280.36

Finding the Fourth Proportional to 10,123.76, 15,187.68 and 4,280.36

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Solution

The fourth proportional to 10,123.76, 15,187.68 and 4,280.36 is: 6,421.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,123.76 : 15,187.68 = 4,280.36 : x
  2. Step 2: Convert to fraction form
    10,123.76/15,187.68 = 4,280.36/x
  3. Step 3: Cross multiply
    10,123.76x = 15,187.68 × 4,280.36
  4. Step 4: Simplify right side
    10,123.76x = 65,008,737.96
  5. Step 5: Solve for x
    x = 65,008,737.96/10,123.76
  6. Step 6: Final answer
    x = 6,421.40

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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.