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Finding the Fourth Proportional to 18,712.95, 25,823.90 and 10,329.45

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Solution

The fourth proportional to 18,712.95, 25,823.90 and 10,329.45 is: 14,254.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.95 : 25,823.90 = 10,329.45 : x
  2. Step 2: Convert to fraction form
    18,712.95/25,823.90 = 10,329.45/x
  3. Step 3: Cross multiply
    18,712.95x = 25,823.90 × 10,329.45
  4. Step 4: Simplify right side
    18,712.95x = 266,746,683.86
  5. Step 5: Solve for x
    x = 266,746,683.86/18,712.95
  6. Step 6: Final answer
    x = 14,254.66

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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.