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Finding the Fourth Proportional to 18,683.60, 25,782.12 and 10,724.72

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Solution

The fourth proportional to 18,683.60, 25,782.12 and 10,724.72 is: 14,799.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,683.60 : 25,782.12 = 10,724.72 : x
  2. Step 2: Convert to fraction form
    18,683.60/25,782.12 = 10,724.72/x
  3. Step 3: Cross multiply
    18,683.60x = 25,782.12 × 10,724.72
  4. Step 4: Simplify right side
    18,683.60x = 276,506,018.01
  5. Step 5: Solve for x
    x = 276,506,018.01/18,683.60
  6. Step 6: Final answer
    x = 14,799.40

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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.