Home / 9,348.64-12,900.88-5,156.80

Finding the Fourth Proportional to 9,348.64, 12,900.88 and 5,156.80

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Solution

The fourth proportional to 9,348.64, 12,900.88 and 5,156.80 is: 7,116.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,348.64 : 12,900.88 = 5,156.80 : x
  2. Step 2: Convert to fraction form
    9,348.64/12,900.88 = 5,156.80/x
  3. Step 3: Cross multiply
    9,348.64x = 12,900.88 × 5,156.80
  4. Step 4: Simplify right side
    9,348.64x = 66,527,257.98
  5. Step 5: Solve for x
    x = 66,527,257.98/9,348.64
  6. Step 6: Final answer
    x = 7,116.25

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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.