Home / 10,521.15-15,779.03-3,123.89

Finding the Fourth Proportional to 10,521.15, 15,779.03 and 3,123.89

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Solution

The fourth proportional to 10,521.15, 15,779.03 and 3,123.89 is: 4,685.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,521.15 : 15,779.03 = 3,123.89 : x
  2. Step 2: Convert to fraction form
    10,521.15/15,779.03 = 3,123.89/x
  3. Step 3: Cross multiply
    10,521.15x = 15,779.03 × 3,123.89
  4. Step 4: Simplify right side
    10,521.15x = 49,292,013.30
  5. Step 5: Solve for x
    x = 49,292,013.30/10,521.15
  6. Step 6: Final answer
    x = 4,685.04

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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.