Home / 12,139,621.80-18,209,432.70-9,429,272.70

Finding the Fourth Proportional to 12,139,621.80, 18,209,432.70 and 9,429,272.70

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Solution

The fourth proportional to 12,139,621.80, 18,209,432.70 and 9,429,272.70 is: 14,143,909.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139,621.80 : 18,209,432.70 = 9,429,272.70 : x
  2. Step 2: Convert to fraction form
    12,139,621.80/18,209,432.70 = 9,429,272.70/x
  3. Step 3: Cross multiply
    12,139,621.80x = 18,209,432.70 × 9,429,272.70
  4. Step 4: Simplify right side
    12,139,621.80x = 171,701,706,640,597.28
  5. Step 5: Solve for x
    x = 171,701,706,640,597.28/12,139,621.80
  6. Step 6: Final answer
    x = 14,143,909.05

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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.