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Finding the Fourth Proportional to 13,779,728.40, 20,669,592.60 and 6,605,274.90

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Solution

The fourth proportional to 13,779,728.40, 20,669,592.60 and 6,605,274.90 is: 9,907,912.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779,728.40 : 20,669,592.60 = 6,605,274.90 : x
  2. Step 2: Convert to fraction form
    13,779,728.40/20,669,592.60 = 6,605,274.90/x
  3. Step 3: Cross multiply
    13,779,728.40x = 20,669,592.60 × 6,605,274.90
  4. Step 4: Simplify right side
    13,779,728.40x = 136,528,341,194,005.75
  5. Step 5: Solve for x
    x = 136,528,341,194,005.75/13,779,728.40
  6. Step 6: Final answer
    x = 9,907,912.35

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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.