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Finding the Fourth Proportional to 18,693.09, 28,039.55 and 17,758.71

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Solution

The fourth proportional to 18,693.09, 28,039.55 and 17,758.71 is: 26,637.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693.09 : 28,039.55 = 17,758.71 : x
  2. Step 2: Convert to fraction form
    18,693.09/28,039.55 = 17,758.71/x
  3. Step 3: Cross multiply
    18,693.09x = 28,039.55 × 17,758.71
  4. Step 4: Simplify right side
    18,693.09x = 497,946,148.19
  5. Step 5: Solve for x
    x = 497,946,148.19/18,693.09
  6. Step 6: Final answer
    x = 26,637.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.