Home / 30,919.79-42,657.14-20,177.24

Finding the Fourth Proportional to 30,919.79, 42,657.14 and 20,177.24

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Solution

The fourth proportional to 30,919.79, 42,657.14 and 20,177.24 is: 27,836.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,919.79 : 42,657.14 = 20,177.24 : x
  2. Step 2: Convert to fraction form
    30,919.79/42,657.14 = 20,177.24/x
  3. Step 3: Cross multiply
    30,919.79x = 42,657.14 × 20,177.24
  4. Step 4: Simplify right side
    30,919.79x = 860,703,037.32
  5. Step 5: Solve for x
    x = 860,703,037.32/30,919.79
  6. Step 6: Final answer
    x = 27,836.64

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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.