Home / 12,210.38-18,287.09-8,915.30

Finding the Fourth Proportional to 12,210.38, 18,287.09 and 8,915.30

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Solution

The fourth proportional to 12,210.38, 18,287.09 and 8,915.30 is: 13,352.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,210.38 : 18,287.09 = 8,915.30 : x
  2. Step 2: Convert to fraction form
    12,210.38/18,287.09 = 8,915.30/x
  3. Step 3: Cross multiply
    12,210.38x = 18,287.09 × 8,915.30
  4. Step 4: Simplify right side
    12,210.38x = 163,034,848.90
  5. Step 5: Solve for x
    x = 163,034,848.90/12,210.38
  6. Step 6: Final answer
    x = 13,352.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.