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Finding the Fourth Proportional to 18,438.30, 25,444.80 and 10,054.80

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Solution

The fourth proportional to 18,438.30, 25,444.80 and 10,054.80 is: 13,875.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438.30 : 25,444.80 = 10,054.80 : x
  2. Step 2: Convert to fraction form
    18,438.30/25,444.80 = 10,054.80/x
  3. Step 3: Cross multiply
    18,438.30x = 25,444.80 × 10,054.80
  4. Step 4: Simplify right side
    18,438.30x = 255,842,375.04
  5. Step 5: Solve for x
    x = 255,842,375.04/18,438.30
  6. Step 6: Final answer
    x = 13,875.59

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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.