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Finding the Fourth Proportional to 20,572,721.65, 28,764,018.95 and 20,572,721.65

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Solution

The fourth proportional to 20,572,721.65, 28,764,018.95 and 20,572,721.65 is: 28,764,018.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572,721.65 : 28,764,018.95 = 20,572,721.65 : x
  2. Step 2: Convert to fraction form
    20,572,721.65/28,764,018.95 = 20,572,721.65/x
  3. Step 3: Cross multiply
    20,572,721.65x = 28,764,018.95 × 20,572,721.65
  4. Step 4: Simplify right side
    20,572,721.65x = 591,754,155,393,675.25
  5. Step 5: Solve for x
    x = 591,754,155,393,675.25/20,572,721.65
  6. Step 6: Final answer
    x = 28,764,018.95

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.