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Finding the Fourth Proportional to 9,411.20, 14,116.80 and 8,547.20

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Solution

The fourth proportional to 9,411.20, 14,116.80 and 8,547.20 is: 12,820.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,411.20 : 14,116.80 = 8,547.20 : x
  2. Step 2: Convert to fraction form
    9,411.20/14,116.80 = 8,547.20/x
  3. Step 3: Cross multiply
    9,411.20x = 14,116.80 × 8,547.20
  4. Step 4: Simplify right side
    9,411.20x = 120,659,112.96
  5. Step 5: Solve for x
    x = 120,659,112.96/9,411.20
  6. Step 6: Final answer
    x = 12,820.80

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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.