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Finding the Fourth Proportional to 9,987.70, 14,988.24 and 4,144.32

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Solution

The fourth proportional to 9,987.70, 14,988.24 and 4,144.32 is: 6,219.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,987.70 : 14,988.24 = 4,144.32 : x
  2. Step 2: Convert to fraction form
    9,987.70/14,988.24 = 4,144.32/x
  3. Step 3: Cross multiply
    9,987.70x = 14,988.24 × 4,144.32
  4. Step 4: Simplify right side
    9,987.70x = 62,116,006.59
  5. Step 5: Solve for x
    x = 62,116,006.59/9,987.70
  6. Step 6: Final answer
    x = 6,219.25

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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.