Home / 15,158.84-20,920.12-8,445.56

Finding the Fourth Proportional to 15,158.84, 20,920.12 and 8,445.56

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Solution

The fourth proportional to 15,158.84, 20,920.12 and 8,445.56 is: 11,655.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,158.84 : 20,920.12 = 8,445.56 : x
  2. Step 2: Convert to fraction form
    15,158.84/20,920.12 = 8,445.56/x
  3. Step 3: Cross multiply
    15,158.84x = 20,920.12 × 8,445.56
  4. Step 4: Simplify right side
    15,158.84x = 176,682,128.67
  5. Step 5: Solve for x
    x = 176,682,128.67/15,158.84
  6. Step 6: Final answer
    x = 11,655.39

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Half scale
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Double scale
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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.