Home / 20,912,695.45-28,861,768.47-12,657,300.87

Finding the Fourth Proportional to 20,912,695.45, 28,861,768.47 and 12,657,300.87

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Solution

The fourth proportional to 20,912,695.45, 28,861,768.47 and 12,657,300.87 is: 17,468,436.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912,695.45 : 28,861,768.47 = 12,657,300.87 : x
  2. Step 2: Convert to fraction form
    20,912,695.45/28,861,768.47 = 12,657,300.87/x
  3. Step 3: Cross multiply
    20,912,695.45x = 28,861,768.47 × 12,657,300.87
  4. Step 4: Simplify right side
    20,912,695.45x = 365,312,087,165,069.50
  5. Step 5: Solve for x
    x = 365,312,087,165,069.50/20,912,695.45
  6. Step 6: Final answer
    x = 17,468,436.24

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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.