Home / 30,972.06-42,754.52-20,914.11

Finding the Fourth Proportional to 30,972.06, 42,754.52 and 20,914.11

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Solution

The fourth proportional to 30,972.06, 42,754.52 and 20,914.11 is: 28,870.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,972.06 : 42,754.52 = 20,914.11 : x
  2. Step 2: Convert to fraction form
    30,972.06/42,754.52 = 20,914.11/x
  3. Step 3: Cross multiply
    30,972.06x = 42,754.52 × 20,914.11
  4. Step 4: Simplify right side
    30,972.06x = 894,172,629.71
  5. Step 5: Solve for x
    x = 894,172,629.71/30,972.06
  6. Step 6: Final answer
    x = 28,870.30

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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.