Home / 8,977.18-12,389-4,998.20

Finding the Fourth Proportional to 8,977.18, 12,389 and 4,998.20

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Solution

The fourth proportional to 8,977.18, 12,389 and 4,998.20 is: 6,897.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,977.18 : 12,389 = 4,998.20 : x
  2. Step 2: Convert to fraction form
    8,977.18/12,389 = 4,998.20/x
  3. Step 3: Cross multiply
    8,977.18x = 12,389 × 4,998.20
  4. Step 4: Simplify right side
    8,977.18x = 61,922,699.80
  5. Step 5: Solve for x
    x = 61,922,699.80/8,977.18
  6. Step 6: Final answer
    x = 6,897.79

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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.