Home / 20,812,128.76-28,721,506.65-11,393,579.98

Finding the Fourth Proportional to 20,812,128.76, 28,721,506.65 and 11,393,579.98

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Solution

The fourth proportional to 20,812,128.76, 28,721,506.65 and 11,393,579.98 is: 15,723,561.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812,128.76 : 28,721,506.65 = 11,393,579.98 : x
  2. Step 2: Convert to fraction form
    20,812,128.76/28,721,506.65 = 11,393,579.98/x
  3. Step 3: Cross multiply
    20,812,128.76x = 28,721,506.65 × 11,393,579.98
  4. Step 4: Simplify right side
    20,812,128.76x = 327,240,783,162,876.88
  5. Step 5: Solve for x
    x = 327,240,783,162,876.88/20,812,128.76
  6. Step 6: Final answer
    x = 15,723,561.34

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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.