Home / 30,974.84-42,731.52-18,392.28

Finding the Fourth Proportional to 30,974.84, 42,731.52 and 18,392.28

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Solution

The fourth proportional to 30,974.84, 42,731.52 and 18,392.28 is: 25,373.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,974.84 : 42,731.52 = 18,392.28 : x
  2. Step 2: Convert to fraction form
    30,974.84/42,731.52 = 18,392.28/x
  3. Step 3: Cross multiply
    30,974.84x = 42,731.52 × 18,392.28
  4. Step 4: Simplify right side
    30,974.84x = 785,930,080.67
  5. Step 5: Solve for x
    x = 785,930,080.67/30,974.84
  6. Step 6: Final answer
    x = 25,373.18

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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.