Home / 10,521.66-15,779.76-3,124.38

Finding the Fourth Proportional to 10,521.66, 15,779.76 and 3,124.38

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Solution

The fourth proportional to 10,521.66, 15,779.76 and 3,124.38 is: 4,685.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,521.66 : 15,779.76 = 3,124.38 : x
  2. Step 2: Convert to fraction form
    10,521.66/15,779.76 = 3,124.38/x
  3. Step 3: Cross multiply
    10,521.66x = 15,779.76 × 3,124.38
  4. Step 4: Simplify right side
    10,521.66x = 49,301,966.55
  5. Step 5: Solve for x
    x = 49,301,966.55/10,521.66
  6. Step 6: Final answer
    x = 4,685.76

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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.