Home / 19,159.80-28,715.40-13,959.60

Finding the Fourth Proportional to 19,159.80, 28,715.40 and 13,959.60

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Solution

The fourth proportional to 19,159.80, 28,715.40 and 13,959.60 is: 20,921.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,159.80 : 28,715.40 = 13,959.60 : x
  2. Step 2: Convert to fraction form
    19,159.80/28,715.40 = 13,959.60/x
  3. Step 3: Cross multiply
    19,159.80x = 28,715.40 × 13,959.60
  4. Step 4: Simplify right side
    19,159.80x = 400,855,497.84
  5. Step 5: Solve for x
    x = 400,855,497.84/19,159.80
  6. Step 6: Final answer
    x = 20,921.70

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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.