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Finding the Fourth Proportional to 25,898,656.80, 38,847,985.20 and 12,461,728.80

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Solution

The fourth proportional to 25,898,656.80, 38,847,985.20 and 12,461,728.80 is: 18,692,593.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,898,656.80 : 38,847,985.20 = 12,461,728.80 : x
  2. Step 2: Convert to fraction form
    25,898,656.80/38,847,985.20 = 12,461,728.80/x
  3. Step 3: Cross multiply
    25,898,656.80x = 38,847,985.20 × 12,461,728.80
  4. Step 4: Simplify right side
    25,898,656.80x = 484,113,055,988,813.81
  5. Step 5: Solve for x
    x = 484,113,055,988,813.81/25,898,656.80
  6. Step 6: Final answer
    x = 18,692,593.20

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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.