Home / 30,631.79-42,140.63-29,319.59

Finding the Fourth Proportional to 30,631.79, 42,140.63 and 29,319.59

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Solution

The fourth proportional to 30,631.79, 42,140.63 and 29,319.59 is: 40,335.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,631.79 : 42,140.63 = 29,319.59 : x
  2. Step 2: Convert to fraction form
    30,631.79/42,140.63 = 29,319.59/x
  3. Step 3: Cross multiply
    30,631.79x = 42,140.63 × 29,319.59
  4. Step 4: Simplify right side
    30,631.79x = 1,235,545,856.54
  5. Step 5: Solve for x
    x = 1,235,545,856.54/30,631.79
  6. Step 6: Final answer
    x = 40,335.42

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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.