Home / 5,123.90-7,685.84-1,614.20

Finding the Fourth Proportional to 5,123.90, 7,685.84 and 1,614.20

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Solution

The fourth proportional to 5,123.90, 7,685.84 and 1,614.20 is: 2,421.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,123.90 : 7,685.84 = 1,614.20 : x
  2. Step 2: Convert to fraction form
    5,123.90/7,685.84 = 1,614.20/x
  3. Step 3: Cross multiply
    5,123.90x = 7,685.84 × 1,614.20
  4. Step 4: Simplify right side
    5,123.90x = 12,406,474.86
  5. Step 5: Solve for x
    x = 12,406,474.86/5,123.90
  6. Step 6: Final answer
    x = 2,421.30

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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.