Home / 11,456.10-15,784.65-9,209.70

Finding the Fourth Proportional to 11,456.10, 15,784.65 and 9,209.70

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Solution

The fourth proportional to 11,456.10, 15,784.65 and 9,209.70 is: 12,689.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,456.10 : 15,784.65 = 9,209.70 : x
  2. Step 2: Convert to fraction form
    11,456.10/15,784.65 = 9,209.70/x
  3. Step 3: Cross multiply
    11,456.10x = 15,784.65 × 9,209.70
  4. Step 4: Simplify right side
    11,456.10x = 145,371,891.11
  5. Step 5: Solve for x
    x = 145,371,891.11/11,456.10
  6. Step 6: Final answer
    x = 12,689.47

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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.