Home / 30,451.12-42,001.69-19,855.11

Finding the Fourth Proportional to 30,451.12, 42,001.69 and 19,855.11

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Solution

The fourth proportional to 30,451.12, 42,001.69 and 19,855.11 is: 27,386.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,451.12 : 42,001.69 = 19,855.11 : x
  2. Step 2: Convert to fraction form
    30,451.12/42,001.69 = 19,855.11/x
  3. Step 3: Cross multiply
    30,451.12x = 42,001.69 × 19,855.11
  4. Step 4: Simplify right side
    30,451.12x = 833,948,175.14
  5. Step 5: Solve for x
    x = 833,948,175.14/30,451.12
  6. Step 6: Final answer
    x = 27,386.45

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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.