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Finding the Fourth Proportional to 30,085.64, 45,123.98 and 7,899.40

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Solution

The fourth proportional to 30,085.64, 45,123.98 and 7,899.40 is: 11,847.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,085.64 : 45,123.98 = 7,899.40 : x
  2. Step 2: Convert to fraction form
    30,085.64/45,123.98 = 7,899.40/x
  3. Step 3: Cross multiply
    30,085.64x = 45,123.98 × 7,899.40
  4. Step 4: Simplify right side
    30,085.64x = 356,452,367.61
  5. Step 5: Solve for x
    x = 356,452,367.61/30,085.64
  6. Step 6: Final answer
    x = 11,847.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.