Home / 15,152.76-20,909.88-8,438.04

Finding the Fourth Proportional to 15,152.76, 20,909.88 and 8,438.04

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Solution

The fourth proportional to 15,152.76, 20,909.88 and 8,438.04 is: 11,643.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,152.76 : 20,909.88 = 8,438.04 : x
  2. Step 2: Convert to fraction form
    15,152.76/20,909.88 = 8,438.04/x
  3. Step 3: Cross multiply
    15,152.76x = 20,909.88 × 8,438.04
  4. Step 4: Simplify right side
    15,152.76x = 176,438,403.84
  5. Step 5: Solve for x
    x = 176,438,403.84/15,152.76
  6. Step 6: Final answer
    x = 11,643.98

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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.