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Finding the Fourth Proportional to 7,888.86, 11,825.30 and 5,117.28

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Solution

The fourth proportional to 7,888.86, 11,825.30 and 5,117.28 is: 7,670.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,888.86 : 11,825.30 = 5,117.28 : x
  2. Step 2: Convert to fraction form
    7,888.86/11,825.30 = 5,117.28/x
  3. Step 3: Cross multiply
    7,888.86x = 11,825.30 × 5,117.28
  4. Step 4: Simplify right side
    7,888.86x = 60,513,371.18
  5. Step 5: Solve for x
    x = 60,513,371.18/7,888.86
  6. Step 6: Final answer
    x = 7,670.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.