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Finding the Fourth Proportional to 9,987.10, 14,980.65 and 3,411.70

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Solution

The fourth proportional to 9,987.10, 14,980.65 and 3,411.70 is: 5,117.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,987.10 : 14,980.65 = 3,411.70 : x
  2. Step 2: Convert to fraction form
    9,987.10/14,980.65 = 3,411.70/x
  3. Step 3: Cross multiply
    9,987.10x = 14,980.65 × 3,411.70
  4. Step 4: Simplify right side
    9,987.10x = 51,109,483.61
  5. Step 5: Solve for x
    x = 51,109,483.61/9,987.10
  6. Step 6: Final answer
    x = 5,117.55

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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.