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Finding the Fourth Proportional to 9,356.40, 12,913.02 and 5,377.14

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Solution

The fourth proportional to 9,356.40, 12,913.02 and 5,377.14 is: 7,421.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,356.40 : 12,913.02 = 5,377.14 : x
  2. Step 2: Convert to fraction form
    9,356.40/12,913.02 = 5,377.14/x
  3. Step 3: Cross multiply
    9,356.40x = 12,913.02 × 5,377.14
  4. Step 4: Simplify right side
    9,356.40x = 69,435,116.36
  5. Step 5: Solve for x
    x = 69,435,116.36/9,356.40
  6. Step 6: Final answer
    x = 7,421.14

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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.