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Finding the Fourth Proportional to 18,898.29, 26,074.81 and 12,931.81

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Solution

The fourth proportional to 18,898.29, 26,074.81 and 12,931.81 is: 17,842.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,898.29 : 26,074.81 = 12,931.81 : x
  2. Step 2: Convert to fraction form
    18,898.29/26,074.81 = 12,931.81/x
  3. Step 3: Cross multiply
    18,898.29x = 26,074.81 × 12,931.81
  4. Step 4: Simplify right side
    18,898.29x = 337,194,424.05
  5. Step 5: Solve for x
    x = 337,194,424.05/18,898.29
  6. Step 6: Final answer
    x = 17,842.59

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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.