Home / 15,315.38-21,135.08-8,600.83

Finding the Fourth Proportional to 15,315.38, 21,135.08 and 8,600.83

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Solution

The fourth proportional to 15,315.38, 21,135.08 and 8,600.83 is: 11,869.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,315.38 : 21,135.08 = 8,600.83 : x
  2. Step 2: Convert to fraction form
    15,315.38/21,135.08 = 8,600.83/x
  3. Step 3: Cross multiply
    15,315.38x = 21,135.08 × 8,600.83
  4. Step 4: Simplify right side
    15,315.38x = 181,779,269.29
  5. Step 5: Solve for x
    x = 181,779,269.29/15,315.38
  6. Step 6: Final answer
    x = 11,869.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.