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Finding the Fourth Proportional to 25,191,648.40, 37,731,485.40 and 20,712,672.40

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Solution

The fourth proportional to 25,191,648.40, 37,731,485.40 and 20,712,672.40 is: 31,022,975.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,191,648.40 : 37,731,485.40 = 20,712,672.40 : x
  2. Step 2: Convert to fraction form
    25,191,648.40/37,731,485.40 = 20,712,672.40/x
  3. Step 3: Cross multiply
    25,191,648.40x = 37,731,485.40 × 20,712,672.40
  4. Step 4: Simplify right side
    25,191,648.40x = 781,519,896,255,582.88
  5. Step 5: Solve for x
    x = 781,519,896,255,582.88/25,191,648.40
  6. Step 6: Final answer
    x = 31,022,975.70

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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.