Home / 8,990.04-12,407.87-5,635.76

Finding the Fourth Proportional to 8,990.04, 12,407.87 and 5,635.76

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Solution

The fourth proportional to 8,990.04, 12,407.87 and 5,635.76 is: 7,778.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.04 : 12,407.87 = 5,635.76 : x
  2. Step 2: Convert to fraction form
    8,990.04/12,407.87 = 5,635.76/x
  3. Step 3: Cross multiply
    8,990.04x = 12,407.87 × 5,635.76
  4. Step 4: Simplify right side
    8,990.04x = 69,927,822.54
  5. Step 5: Solve for x
    x = 69,927,822.54/8,990.04
  6. Step 6: Final answer
    x = 7,778.37

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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.