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Finding the Fourth Proportional to 10,389,912.40, 15,549,439.20 and 10,389,912.40

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Solution

The fourth proportional to 10,389,912.40, 15,549,439.20 and 10,389,912.40 is: 15,549,439.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,389,912.40 : 15,549,439.20 = 10,389,912.40 : x
  2. Step 2: Convert to fraction form
    10,389,912.40/15,549,439.20 = 10,389,912.40/x
  3. Step 3: Cross multiply
    10,389,912.40x = 15,549,439.20 × 10,389,912.40
  4. Step 4: Simplify right side
    10,389,912.40x = 161,557,311,157,126.06
  5. Step 5: Solve for x
    x = 161,557,311,157,126.06/10,389,912.40
  6. Step 6: Final answer
    x = 15,549,439.20

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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.