Home / 31,069.29-42,860.96-21,001.24

Finding the Fourth Proportional to 31,069.29, 42,860.96 and 21,001.24

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Solution

The fourth proportional to 31,069.29, 42,860.96 and 21,001.24 is: 28,971.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,069.29 : 42,860.96 = 21,001.24 : x
  2. Step 2: Convert to fraction form
    31,069.29/42,860.96 = 21,001.24/x
  3. Step 3: Cross multiply
    31,069.29x = 42,860.96 × 21,001.24
  4. Step 4: Simplify right side
    31,069.29x = 900,133,202.58
  5. Step 5: Solve for x
    x = 900,133,202.58/31,069.29
  6. Step 6: Final answer
    x = 28,971.80

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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.