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Finding the Fourth Proportional to 31,053, 42,858.74 and 18,305.43

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Solution

The fourth proportional to 31,053, 42,858.74 and 18,305.43 is: 25,264.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,053 : 42,858.74 = 18,305.43 : x
  2. Step 2: Convert to fraction form
    31,053/42,858.74 = 18,305.43/x
  3. Step 3: Cross multiply
    31,053x = 42,858.74 × 18,305.43
  4. Step 4: Simplify right side
    31,053x = 784,547,664.96
  5. Step 5: Solve for x
    x = 784,547,664.96/31,053
  6. Step 6: Final answer
    x = 25,264.79

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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.