Home / 15,139.32-20,890.80-8,767.68

Finding the Fourth Proportional to 15,139.32, 20,890.80 and 8,767.68

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Solution

The fourth proportional to 15,139.32, 20,890.80 and 8,767.68 is: 12,098.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,139.32 : 20,890.80 = 8,767.68 : x
  2. Step 2: Convert to fraction form
    15,139.32/20,890.80 = 8,767.68/x
  3. Step 3: Cross multiply
    15,139.32x = 20,890.80 × 8,767.68
  4. Step 4: Simplify right side
    15,139.32x = 183,163,849.34
  5. Step 5: Solve for x
    x = 183,163,849.34/15,139.32
  6. Step 6: Final answer
    x = 12,098.55

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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.