Home / 9,412.15-12,988.57-5,220.40

Finding the Fourth Proportional to 9,412.15, 12,988.57 and 5,220.40

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Solution

The fourth proportional to 9,412.15, 12,988.57 and 5,220.40 is: 7,204.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,412.15 : 12,988.57 = 5,220.40 : x
  2. Step 2: Convert to fraction form
    9,412.15/12,988.57 = 5,220.40/x
  3. Step 3: Cross multiply
    9,412.15x = 12,988.57 × 5,220.40
  4. Step 4: Simplify right side
    9,412.15x = 67,805,530.83
  5. Step 5: Solve for x
    x = 67,805,530.83/9,412.15
  6. Step 6: Final answer
    x = 7,204.04

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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.