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Finding the Fourth Proportional to 18,957.88, 26,164.56 and 13,670.20

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Solution

The fourth proportional to 18,957.88, 26,164.56 and 13,670.20 is: 18,866.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,957.88 : 26,164.56 = 13,670.20 : x
  2. Step 2: Convert to fraction form
    18,957.88/26,164.56 = 13,670.20/x
  3. Step 3: Cross multiply
    18,957.88x = 26,164.56 × 13,670.20
  4. Step 4: Simplify right side
    18,957.88x = 357,674,768.11
  5. Step 5: Solve for x
    x = 357,674,768.11/18,957.88
  6. Step 6: Final answer
    x = 18,866.81

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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.