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Finding the Fourth Proportional to 40,898.79, 61,348.95 and 12,818.22

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Solution

The fourth proportional to 40,898.79, 61,348.95 and 12,818.22 is: 19,227.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,898.79 : 61,348.95 = 12,818.22 : x
  2. Step 2: Convert to fraction form
    40,898.79/61,348.95 = 12,818.22/x
  3. Step 3: Cross multiply
    40,898.79x = 61,348.95 × 12,818.22
  4. Step 4: Simplify right side
    40,898.79x = 786,384,488.95
  5. Step 5: Solve for x
    x = 786,384,488.95/40,898.79
  6. Step 6: Final answer
    x = 19,227.57

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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.