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Finding the Fourth Proportional to 13,608,053.20, 20,412,079.80 and 7,623,643.60

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Solution

The fourth proportional to 13,608,053.20, 20,412,079.80 and 7,623,643.60 is: 11,435,465.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608,053.20 : 20,412,079.80 = 7,623,643.60 : x
  2. Step 2: Convert to fraction form
    13,608,053.20/20,412,079.80 = 7,623,643.60/x
  3. Step 3: Cross multiply
    13,608,053.20x = 20,412,079.80 × 7,623,643.60
  4. Step 4: Simplify right side
    13,608,053.20x = 155,614,421,529,959.28
  5. Step 5: Solve for x
    x = 155,614,421,529,959.28/13,608,053.20
  6. Step 6: Final answer
    x = 11,435,465.40

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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.