Home / 9,291.47-12,820.19-5,515.88

Finding the Fourth Proportional to 9,291.47, 12,820.19 and 5,515.88

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Solution

The fourth proportional to 9,291.47, 12,820.19 and 5,515.88 is: 7,610.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,291.47 : 12,820.19 = 5,515.88 : x
  2. Step 2: Convert to fraction form
    9,291.47/12,820.19 = 5,515.88/x
  3. Step 3: Cross multiply
    9,291.47x = 12,820.19 × 5,515.88
  4. Step 4: Simplify right side
    9,291.47x = 70,714,565.52
  5. Step 5: Solve for x
    x = 70,714,565.52/9,291.47
  6. Step 6: Final answer
    x = 7,610.70

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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.