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Finding the Fourth Proportional to 29,019.30, 40,039.64 and 18,405.06

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Solution

The fourth proportional to 29,019.30, 40,039.64 and 18,405.06 is: 25,394.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,019.30 : 40,039.64 = 18,405.06 : x
  2. Step 2: Convert to fraction form
    29,019.30/40,039.64 = 18,405.06/x
  3. Step 3: Cross multiply
    29,019.30x = 40,039.64 × 18,405.06
  4. Step 4: Simplify right side
    29,019.30x = 736,931,976.58
  5. Step 5: Solve for x
    x = 736,931,976.58/29,019.30
  6. Step 6: Final answer
    x = 25,394.55

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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.