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Finding the Fourth Proportional to 18,646.40, 25,731.28 and 10,683.10

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Solution

The fourth proportional to 18,646.40, 25,731.28 and 10,683.10 is: 14,742.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,646.40 : 25,731.28 = 10,683.10 : x
  2. Step 2: Convert to fraction form
    18,646.40/25,731.28 = 10,683.10/x
  3. Step 3: Cross multiply
    18,646.40x = 25,731.28 × 10,683.10
  4. Step 4: Simplify right side
    18,646.40x = 274,889,837.37
  5. Step 5: Solve for x
    x = 274,889,837.37/18,646.40
  6. Step 6: Final answer
    x = 14,742.25

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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.