Home / 15,155.73-20,923.58-10,128.47

Finding the Fourth Proportional to 15,155.73, 20,923.58 and 10,128.47

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Solution

The fourth proportional to 15,155.73, 20,923.58 and 10,128.47 is: 13,983.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,155.73 : 20,923.58 = 10,128.47 : x
  2. Step 2: Convert to fraction form
    15,155.73/20,923.58 = 10,128.47/x
  3. Step 3: Cross multiply
    15,155.73x = 20,923.58 × 10,128.47
  4. Step 4: Simplify right side
    15,155.73x = 211,923,773.03
  5. Step 5: Solve for x
    x = 211,923,773.03/15,155.73
  6. Step 6: Final answer
    x = 13,983.08

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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.