Home / 28,085,428.80-42,128,143.20-13,701,092.40

Finding the Fourth Proportional to 28,085,428.80, 42,128,143.20 and 13,701,092.40

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Solution

The fourth proportional to 28,085,428.80, 42,128,143.20 and 13,701,092.40 is: 20,551,638.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,085,428.80 : 42,128,143.20 = 13,701,092.40 : x
  2. Step 2: Convert to fraction form
    28,085,428.80/42,128,143.20 = 13,701,092.40/x
  3. Step 3: Cross multiply
    28,085,428.80x = 42,128,143.20 × 13,701,092.40
  4. Step 4: Simplify right side
    28,085,428.80x = 577,201,582,623,631.75
  5. Step 5: Solve for x
    x = 577,201,582,623,631.75/28,085,428.80
  6. Step 6: Final answer
    x = 20,551,638.60

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Similar ratio
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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.