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Finding the Fourth Proportional to 11,555.60, 15,943.56 and 7,360.40

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Solution

The fourth proportional to 11,555.60, 15,943.56 and 7,360.40 is: 10,155.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,555.60 : 15,943.56 = 7,360.40 : x
  2. Step 2: Convert to fraction form
    11,555.60/15,943.56 = 7,360.40/x
  3. Step 3: Cross multiply
    11,555.60x = 15,943.56 × 7,360.40
  4. Step 4: Simplify right side
    11,555.60x = 117,350,979.02
  5. Step 5: Solve for x
    x = 117,350,979.02/11,555.60
  6. Step 6: Final answer
    x = 10,155.33

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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.