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Finding the Fourth Proportional to 10,959.72, 15,121.80 and 6,483.12

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Solution

The fourth proportional to 10,959.72, 15,121.80 and 6,483.12 is: 8,945.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,959.72 : 15,121.80 = 6,483.12 : x
  2. Step 2: Convert to fraction form
    10,959.72/15,121.80 = 6,483.12/x
  3. Step 3: Cross multiply
    10,959.72x = 15,121.80 × 6,483.12
  4. Step 4: Simplify right side
    10,959.72x = 98,036,444.02
  5. Step 5: Solve for x
    x = 98,036,444.02/10,959.72
  6. Step 6: Final answer
    x = 8,945.16

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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.