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Finding the Fourth Proportional to 8,712.64, 12,024.48 and 4,987.84

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Solution

The fourth proportional to 8,712.64, 12,024.48 and 4,987.84 is: 6,883.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,712.64 : 12,024.48 = 4,987.84 : x
  2. Step 2: Convert to fraction form
    8,712.64/12,024.48 = 4,987.84/x
  3. Step 3: Cross multiply
    8,712.64x = 12,024.48 × 4,987.84
  4. Step 4: Simplify right side
    8,712.64x = 59,976,182.32
  5. Step 5: Solve for x
    x = 59,976,182.32/8,712.64
  6. Step 6: Final answer
    x = 6,883.81

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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.