Home / 30,642.76-42,258.92-19,876.41

Finding the Fourth Proportional to 30,642.76, 42,258.92 and 19,876.41

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Solution

The fourth proportional to 30,642.76, 42,258.92 and 19,876.41 is: 27,411.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,642.76 : 42,258.92 = 19,876.41 : x
  2. Step 2: Convert to fraction form
    30,642.76/42,258.92 = 19,876.41/x
  3. Step 3: Cross multiply
    30,642.76x = 42,258.92 × 19,876.41
  4. Step 4: Simplify right side
    30,642.76x = 839,955,639.55
  5. Step 5: Solve for x
    x = 839,955,639.55/30,642.76
  6. Step 6: Final answer
    x = 27,411.23

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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.