Home / 7,988.16-11,020.48-5,155.20

Finding the Fourth Proportional to 7,988.16, 11,020.48 and 5,155.20

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Solution

The fourth proportional to 7,988.16, 11,020.48 and 5,155.20 is: 7,112.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,988.16 : 11,020.48 = 5,155.20 : x
  2. Step 2: Convert to fraction form
    7,988.16/11,020.48 = 5,155.20/x
  3. Step 3: Cross multiply
    7,988.16x = 11,020.48 × 5,155.20
  4. Step 4: Simplify right side
    7,988.16x = 56,812,778.50
  5. Step 5: Solve for x
    x = 56,812,778.50/7,988.16
  6. Step 6: Final answer
    x = 7,112.12

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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.