Home / 30,948.57-42,718.74-19,770.57

Finding the Fourth Proportional to 30,948.57, 42,718.74 and 19,770.57

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Solution

The fourth proportional to 30,948.57, 42,718.74 and 19,770.57 is: 27,289.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,948.57 : 42,718.74 = 19,770.57 : x
  2. Step 2: Convert to fraction form
    30,948.57/42,718.74 = 19,770.57/x
  3. Step 3: Cross multiply
    30,948.57x = 42,718.74 × 19,770.57
  4. Step 4: Simplify right side
    30,948.57x = 844,573,839.48
  5. Step 5: Solve for x
    x = 844,573,839.48/30,948.57
  6. Step 6: Final answer
    x = 27,289.59

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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.