Home / 15,156.72-20,916.09-8,869.10

Finding the Fourth Proportional to 15,156.72, 20,916.09 and 8,869.10

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Solution

The fourth proportional to 15,156.72, 20,916.09 and 8,869.10 is: 12,239.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,156.72 : 20,916.09 = 8,869.10 : x
  2. Step 2: Convert to fraction form
    15,156.72/20,916.09 = 8,869.10/x
  3. Step 3: Cross multiply
    15,156.72x = 20,916.09 × 8,869.10
  4. Step 4: Simplify right side
    15,156.72x = 185,506,789.24
  5. Step 5: Solve for x
    x = 185,506,789.24/15,156.72
  6. Step 6: Final answer
    x = 12,239.24

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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.