Home / 21,146,680.80-31,720,021.20-20,054,930.40

Finding the Fourth Proportional to 21,146,680.80, 31,720,021.20 and 20,054,930.40

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Solution

The fourth proportional to 21,146,680.80, 31,720,021.20 and 20,054,930.40 is: 30,082,395.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,146,680.80 : 31,720,021.20 = 20,054,930.40 : x
  2. Step 2: Convert to fraction form
    21,146,680.80/31,720,021.20 = 20,054,930.40/x
  3. Step 3: Cross multiply
    21,146,680.80x = 31,720,021.20 × 20,054,930.40
  4. Step 4: Simplify right side
    21,146,680.80x = 636,142,817,452,524.38
  5. Step 5: Solve for x
    x = 636,142,817,452,524.38/21,146,680.80
  6. Step 6: Final answer
    x = 30,082,395.60

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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.