Home / 12,768,045.40-19,152,068.10-7,981,139.80

Finding the Fourth Proportional to 12,768,045.40, 19,152,068.10 and 7,981,139.80

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Solution

The fourth proportional to 12,768,045.40, 19,152,068.10 and 7,981,139.80 is: 11,971,709.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,768,045.40 : 19,152,068.10 = 7,981,139.80 : x
  2. Step 2: Convert to fraction form
    12,768,045.40/19,152,068.10 = 7,981,139.80/x
  3. Step 3: Cross multiply
    12,768,045.40x = 19,152,068.10 × 7,981,139.80
  4. Step 4: Simplify right side
    12,768,045.40x = 152,855,332,965,220.38
  5. Step 5: Solve for x
    x = 152,855,332,965,220.38/12,768,045.40
  6. Step 6: Final answer
    x = 11,971,709.70

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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.