Home / 30,761.30-42,359.01-28,528.55

Finding the Fourth Proportional to 30,761.30, 42,359.01 and 28,528.55

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Solution

The fourth proportional to 30,761.30, 42,359.01 and 28,528.55 is: 39,284.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,761.30 : 42,359.01 = 28,528.55 : x
  2. Step 2: Convert to fraction form
    30,761.30/42,359.01 = 28,528.55/x
  3. Step 3: Cross multiply
    30,761.30x = 42,359.01 × 28,528.55
  4. Step 4: Simplify right side
    30,761.30x = 1,208,441,134.74
  5. Step 5: Solve for x
    x = 1,208,441,134.74/30,761.30
  6. Step 6: Final answer
    x = 39,284.46

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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.