Home / 20,918,688.80-31,389,178.80-8,139,610.40

Finding the Fourth Proportional to 20,918,688.80, 31,389,178.80 and 8,139,610.40

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Solution

The fourth proportional to 20,918,688.80, 31,389,178.80 and 8,139,610.40 is: 12,213,752.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918,688.80 : 31,389,178.80 = 8,139,610.40 : x
  2. Step 2: Convert to fraction form
    20,918,688.80/31,389,178.80 = 8,139,610.40/x
  3. Step 3: Cross multiply
    20,918,688.80x = 31,389,178.80 × 8,139,610.40
  4. Step 4: Simplify right side
    20,918,688.80x = 255,495,686,207,939.53
  5. Step 5: Solve for x
    x = 255,495,686,207,939.53/20,918,688.80
  6. Step 6: Final answer
    x = 12,213,752.43

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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.