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Finding the Fourth Proportional to 9,403.61, 12,976.90 and 5,154.90

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Solution

The fourth proportional to 9,403.61, 12,976.90 and 5,154.90 is: 7,113.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,403.61 : 12,976.90 = 5,154.90 : x
  2. Step 2: Convert to fraction form
    9,403.61/12,976.90 = 5,154.90/x
  3. Step 3: Cross multiply
    9,403.61x = 12,976.90 × 5,154.90
  4. Step 4: Simplify right side
    9,403.61x = 66,894,621.81
  5. Step 5: Solve for x
    x = 66,894,621.81/9,403.61
  6. Step 6: Final answer
    x = 7,113.72

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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.