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Finding the Fourth Proportional to 30,953.97, 42,734.71 and 18,859.02

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Solution

The fourth proportional to 30,953.97, 42,734.71 and 18,859.02 is: 26,036.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,953.97 : 42,734.71 = 18,859.02 : x
  2. Step 2: Convert to fraction form
    30,953.97/42,734.71 = 18,859.02/x
  3. Step 3: Cross multiply
    30,953.97x = 42,734.71 × 18,859.02
  4. Step 4: Simplify right side
    30,953.97x = 805,934,787.14
  5. Step 5: Solve for x
    x = 805,934,787.14/30,953.97
  6. Step 6: Final answer
    x = 26,036.55

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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.