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Finding the Fourth Proportional to 9,316.53, 12,857.25 and 5,780.88

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Solution

The fourth proportional to 9,316.53, 12,857.25 and 5,780.88 is: 7,977.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,316.53 : 12,857.25 = 5,780.88 : x
  2. Step 2: Convert to fraction form
    9,316.53/12,857.25 = 5,780.88/x
  3. Step 3: Cross multiply
    9,316.53x = 12,857.25 × 5,780.88
  4. Step 4: Simplify right side
    9,316.53x = 74,326,219.38
  5. Step 5: Solve for x
    x = 74,326,219.38/9,316.53
  6. Step 6: Final answer
    x = 7,977.89

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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.