Home / 12,127,921.20-18,191,881.80-7,076,631.60

Finding the Fourth Proportional to 12,127,921.20, 18,191,881.80 and 7,076,631.60

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Solution

The fourth proportional to 12,127,921.20, 18,191,881.80 and 7,076,631.60 is: 10,614,947.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,127,921.20 : 18,191,881.80 = 7,076,631.60 : x
  2. Step 2: Convert to fraction form
    12,127,921.20/18,191,881.80 = 7,076,631.60/x
  3. Step 3: Cross multiply
    12,127,921.20x = 18,191,881.80 × 7,076,631.60
  4. Step 4: Simplify right side
    12,127,921.20x = 128,737,245,609,344.88
  5. Step 5: Solve for x
    x = 128,737,245,609,344.88/12,127,921.20
  6. Step 6: Final answer
    x = 10,614,947.40

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1.5x scale

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.