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Finding the Fourth Proportional to 12,949,638.80, 19,429,901.40 and 6,959,008.40

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Solution

The fourth proportional to 12,949,638.80, 19,429,901.40 and 6,959,008.40 is: 10,441,437.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,949,638.80 : 19,429,901.40 = 6,959,008.40 : x
  2. Step 2: Convert to fraction form
    12,949,638.80/19,429,901.40 = 6,959,008.40/x
  3. Step 3: Cross multiply
    12,949,638.80x = 19,429,901.40 × 6,959,008.40
  4. Step 4: Simplify right side
    12,949,638.80x = 135,212,847,053,771.75
  5. Step 5: Solve for x
    x = 135,212,847,053,771.75/12,949,638.80
  6. Step 6: Final answer
    x = 10,441,437.72

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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.