Home / 20,971,329.60-31,394,008.80-12,447,278.40

Finding the Fourth Proportional to 20,971,329.60, 31,394,008.80 and 12,447,278.40

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Solution

The fourth proportional to 20,971,329.60, 31,394,008.80 and 12,447,278.40 is: 18,633,533.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971,329.60 : 31,394,008.80 = 12,447,278.40 : x
  2. Step 2: Convert to fraction form
    20,971,329.60/31,394,008.80 = 12,447,278.40/x
  3. Step 3: Cross multiply
    20,971,329.60x = 31,394,008.80 × 12,447,278.40
  4. Step 4: Simplify right side
    20,971,329.60x = 390,769,967,625,649.94
  5. Step 5: Solve for x
    x = 390,769,967,625,649.94/20,971,329.60
  6. Step 6: Final answer
    x = 18,633,533.26

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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.