Home / 20,981,311.02-28,955,102.78-11,688,875.82

Finding the Fourth Proportional to 20,981,311.02, 28,955,102.78 and 11,688,875.82

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Solution

The fourth proportional to 20,981,311.02, 28,955,102.78 and 11,688,875.82 is: 16,131,146.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981,311.02 : 28,955,102.78 = 11,688,875.82 : x
  2. Step 2: Convert to fraction form
    20,981,311.02/28,955,102.78 = 11,688,875.82/x
  3. Step 3: Cross multiply
    20,981,311.02x = 28,955,102.78 × 11,688,875.82
  4. Step 4: Simplify right side
    20,981,311.02x = 338,452,600,692,312.38
  5. Step 5: Solve for x
    x = 338,452,600,692,312.38/20,981,311.02
  6. Step 6: Final answer
    x = 16,131,146.45

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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.