Home / 30,842.13-42,518.49-21,886.38

Finding the Fourth Proportional to 30,842.13, 42,518.49 and 21,886.38

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Solution

The fourth proportional to 30,842.13, 42,518.49 and 21,886.38 is: 30,172.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,842.13 : 42,518.49 = 21,886.38 : x
  2. Step 2: Convert to fraction form
    30,842.13/42,518.49 = 21,886.38/x
  3. Step 3: Cross multiply
    30,842.13x = 42,518.49 × 21,886.38
  4. Step 4: Simplify right side
    30,842.13x = 930,575,829.17
  5. Step 5: Solve for x
    x = 930,575,829.17/30,842.13
  6. Step 6: Final answer
    x = 30,172.23

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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.