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Finding the Fourth Proportional to 20,572,719.40, 28,764,015.80 and 20,572,719.40

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Solution

The fourth proportional to 20,572,719.40, 28,764,015.80 and 20,572,719.40 is: 28,764,015.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572,719.40 : 28,764,015.80 = 20,572,719.40 : x
  2. Step 2: Convert to fraction form
    20,572,719.40/28,764,015.80 = 20,572,719.40/x
  3. Step 3: Cross multiply
    20,572,719.40x = 28,764,015.80 × 20,572,719.40
  4. Step 4: Simplify right side
    20,572,719.40x = 591,754,025,870,566.50
  5. Step 5: Solve for x
    x = 591,754,025,870,566.50/20,572,719.40
  6. Step 6: Final answer
    x = 28,764,015.80

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1.5x scale

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.