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Finding the Fourth Proportional to 40,490.80, 55,852.80 and 26,128.15

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Solution

The fourth proportional to 40,490.80, 55,852.80 and 26,128.15 is: 36,041.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,490.80 : 55,852.80 = 26,128.15 : x
  2. Step 2: Convert to fraction form
    40,490.80/55,852.80 = 26,128.15/x
  3. Step 3: Cross multiply
    40,490.80x = 55,852.80 × 26,128.15
  4. Step 4: Simplify right side
    40,490.80x = 1,459,330,336.32
  5. Step 5: Solve for x
    x = 1,459,330,336.32/40,490.80
  6. Step 6: Final answer
    x = 36,041.03

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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.