Home / 15,459.12-21,333.47-8,385.55

Finding the Fourth Proportional to 15,459.12, 21,333.47 and 8,385.55

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Solution

The fourth proportional to 15,459.12, 21,333.47 and 8,385.55 is: 11,571.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,459.12 : 21,333.47 = 8,385.55 : x
  2. Step 2: Convert to fraction form
    15,459.12/21,333.47 = 8,385.55/x
  3. Step 3: Cross multiply
    15,459.12x = 21,333.47 × 8,385.55
  4. Step 4: Simplify right side
    15,459.12x = 178,892,772.69
  5. Step 5: Solve for x
    x = 178,892,772.69/15,459.12
  6. Step 6: Final answer
    x = 11,571.99

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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.