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Finding the Fourth Proportional to 18,989.91, 26,205.53 and 10,492.20

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Solution

The fourth proportional to 18,989.91, 26,205.53 and 10,492.20 is: 14,478.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,989.91 : 26,205.53 = 10,492.20 : x
  2. Step 2: Convert to fraction form
    18,989.91/26,205.53 = 10,492.20/x
  3. Step 3: Cross multiply
    18,989.91x = 26,205.53 × 10,492.20
  4. Step 4: Simplify right side
    18,989.91x = 274,953,609.41
  5. Step 5: Solve for x
    x = 274,953,609.41/18,989.91
  6. Step 6: Final answer
    x = 14,478.93

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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.