Home / 30,557.71-42,170.79-17,129.23

Finding the Fourth Proportional to 30,557.71, 42,170.79 and 17,129.23

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Solution

The fourth proportional to 30,557.71, 42,170.79 and 17,129.23 is: 23,638.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,557.71 : 42,170.79 = 17,129.23 : x
  2. Step 2: Convert to fraction form
    30,557.71/42,170.79 = 17,129.23/x
  3. Step 3: Cross multiply
    30,557.71x = 42,170.79 × 17,129.23
  4. Step 4: Simplify right side
    30,557.71x = 722,353,161.19
  5. Step 5: Solve for x
    x = 722,353,161.19/30,557.71
  6. Step 6: Final answer
    x = 23,638.98

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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.