Home / 20,080.08-27,660.12-15,356.40

Finding the Fourth Proportional to 20,080.08, 27,660.12 and 15,356.40

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Solution

The fourth proportional to 20,080.08, 27,660.12 and 15,356.40 is: 21,153.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,080.08 : 27,660.12 = 15,356.40 : x
  2. Step 2: Convert to fraction form
    20,080.08/27,660.12 = 15,356.40/x
  3. Step 3: Cross multiply
    20,080.08x = 27,660.12 × 15,356.40
  4. Step 4: Simplify right side
    20,080.08x = 424,759,866.77
  5. Step 5: Solve for x
    x = 424,759,866.77/20,080.08
  6. Step 6: Final answer
    x = 21,153.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.