Home / 8,938.64-12,335.55-4,905.65

Finding the Fourth Proportional to 8,938.64, 12,335.55 and 4,905.65

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Solution

The fourth proportional to 8,938.64, 12,335.55 and 4,905.65 is: 6,769.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,938.64 : 12,335.55 = 4,905.65 : x
  2. Step 2: Convert to fraction form
    8,938.64/12,335.55 = 4,905.65/x
  3. Step 3: Cross multiply
    8,938.64x = 12,335.55 × 4,905.65
  4. Step 4: Simplify right side
    8,938.64x = 60,513,890.86
  5. Step 5: Solve for x
    x = 60,513,890.86/8,938.64
  6. Step 6: Final answer
    x = 6,769.92

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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.