Home / 31,028.40-42,838.20-19,107.89

Finding the Fourth Proportional to 31,028.40, 42,838.20 and 19,107.89

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Solution

The fourth proportional to 31,028.40, 42,838.20 and 19,107.89 is: 26,380.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,028.40 : 42,838.20 = 19,107.89 : x
  2. Step 2: Convert to fraction form
    31,028.40/42,838.20 = 19,107.89/x
  3. Step 3: Cross multiply
    31,028.40x = 42,838.20 × 19,107.89
  4. Step 4: Simplify right side
    31,028.40x = 818,547,580.22
  5. Step 5: Solve for x
    x = 818,547,580.22/31,028.40
  6. Step 6: Final answer
    x = 26,380.59

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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.