Home / 15,153.08-20,909.76-8,438.45

Finding the Fourth Proportional to 15,153.08, 20,909.76 and 8,438.45

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Solution

The fourth proportional to 15,153.08, 20,909.76 and 8,438.45 is: 11,644.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,153.08 : 20,909.76 = 8,438.45 : x
  2. Step 2: Convert to fraction form
    15,153.08/20,909.76 = 8,438.45/x
  3. Step 3: Cross multiply
    15,153.08x = 20,909.76 × 8,438.45
  4. Step 4: Simplify right side
    15,153.08x = 176,445,964.27
  5. Step 5: Solve for x
    x = 176,445,964.27/15,153.08
  6. Step 6: Final answer
    x = 11,644.23

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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.