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Finding the Fourth Proportional to 20,855,306.40, 31,282,959.60 and 20,855,306.40

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Solution

The fourth proportional to 20,855,306.40, 31,282,959.60 and 20,855,306.40 is: 31,282,959.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855,306.40 : 31,282,959.60 = 20,855,306.40 : x
  2. Step 2: Convert to fraction form
    20,855,306.40/31,282,959.60 = 20,855,306.40/x
  3. Step 3: Cross multiply
    20,855,306.40x = 31,282,959.60 × 20,855,306.40
  4. Step 4: Simplify right side
    20,855,306.40x = 652,415,707,556,821.38
  5. Step 5: Solve for x
    x = 652,415,707,556,821.38/20,855,306.40
  6. Step 6: Final answer
    x = 31,282,959.60

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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.