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Finding the Fourth Proportional to 30,984.40, 42,659.40 and 26,261.20

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Solution

The fourth proportional to 30,984.40, 42,659.40 and 26,261.20 is: 36,156.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,984.40 : 42,659.40 = 26,261.20 : x
  2. Step 2: Convert to fraction form
    30,984.40/42,659.40 = 26,261.20/x
  3. Step 3: Cross multiply
    30,984.40x = 42,659.40 × 26,261.20
  4. Step 4: Simplify right side
    30,984.40x = 1,120,287,035.28
  5. Step 5: Solve for x
    x = 1,120,287,035.28/30,984.40
  6. Step 6: Final answer
    x = 36,156.49

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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.