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Finding the Fourth Proportional to 8,878.68, 13,319.64 and 4,720.68

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Solution

The fourth proportional to 8,878.68, 13,319.64 and 4,720.68 is: 7,081.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,878.68 : 13,319.64 = 4,720.68 : x
  2. Step 2: Convert to fraction form
    8,878.68/13,319.64 = 4,720.68/x
  3. Step 3: Cross multiply
    8,878.68x = 13,319.64 × 4,720.68
  4. Step 4: Simplify right side
    8,878.68x = 62,877,758.16
  5. Step 5: Solve for x
    x = 62,877,758.16/8,878.68
  6. Step 6: Final answer
    x = 7,081.88

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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.