Home / 30,693.44-42,357.12-18,124.40

Finding the Fourth Proportional to 30,693.44, 42,357.12 and 18,124.40

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Solution

The fourth proportional to 30,693.44, 42,357.12 and 18,124.40 is: 25,011.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,693.44 : 42,357.12 = 18,124.40 : x
  2. Step 2: Convert to fraction form
    30,693.44/42,357.12 = 18,124.40/x
  3. Step 3: Cross multiply
    30,693.44x = 42,357.12 × 18,124.40
  4. Step 4: Simplify right side
    30,693.44x = 767,697,385.73
  5. Step 5: Solve for x
    x = 767,697,385.73/30,693.44
  6. Step 6: Final answer
    x = 25,011.77

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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.