Home / 30,631.40-42,283.02-29,788.72

Finding the Fourth Proportional to 30,631.40, 42,283.02 and 29,788.72

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Solution

The fourth proportional to 30,631.40, 42,283.02 and 29,788.72 is: 41,119.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,631.40 : 42,283.02 = 29,788.72 : x
  2. Step 2: Convert to fraction form
    30,631.40/42,283.02 = 29,788.72/x
  3. Step 3: Cross multiply
    30,631.40x = 42,283.02 × 29,788.72
  4. Step 4: Simplify right side
    30,631.40x = 1,259,557,043.53
  5. Step 5: Solve for x
    x = 1,259,557,043.53/30,631.40
  6. Step 6: Final answer
    x = 41,119.80

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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.