Home / 30,937.20-42,693.12-16,789.68

Finding the Fourth Proportional to 30,937.20, 42,693.12 and 16,789.68

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Solution

The fourth proportional to 30,937.20, 42,693.12 and 16,789.68 is: 23,169.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,937.20 : 42,693.12 = 16,789.68 : x
  2. Step 2: Convert to fraction form
    30,937.20/42,693.12 = 16,789.68/x
  3. Step 3: Cross multiply
    30,937.20x = 42,693.12 × 16,789.68
  4. Step 4: Simplify right side
    30,937.20x = 716,803,823.00
  5. Step 5: Solve for x
    x = 716,803,823.00/30,937.20
  6. Step 6: Final answer
    x = 23,169.64

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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.