Home / 9,411.80-12,988.28-5,220.05

Finding the Fourth Proportional to 9,411.80, 12,988.28 and 5,220.05

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Solution

The fourth proportional to 9,411.80, 12,988.28 and 5,220.05 is: 7,203.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,411.80 : 12,988.28 = 5,220.05 : x
  2. Step 2: Convert to fraction form
    9,411.80/12,988.28 = 5,220.05/x
  3. Step 3: Cross multiply
    9,411.80x = 12,988.28 × 5,220.05
  4. Step 4: Simplify right side
    9,411.80x = 67,799,379.97
  5. Step 5: Solve for x
    x = 67,799,379.97/9,411.80
  6. Step 6: Final answer
    x = 7,203.66

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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.