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Finding the Fourth Proportional to 8,980.61, 13,391.80 and 8,357.32

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Solution

The fourth proportional to 8,980.61, 13,391.80 and 8,357.32 is: 12,462.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,980.61 : 13,391.80 = 8,357.32 : x
  2. Step 2: Convert to fraction form
    8,980.61/13,391.80 = 8,357.32/x
  3. Step 3: Cross multiply
    8,980.61x = 13,391.80 × 8,357.32
  4. Step 4: Simplify right side
    8,980.61x = 111,919,491.02
  5. Step 5: Solve for x
    x = 111,919,491.02/8,980.61
  6. Step 6: Final answer
    x = 12,462.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.