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Finding the Fourth Proportional to 18,653, 25,742.99 and 13,929.08

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Solution

The fourth proportional to 18,653, 25,742.99 and 13,929.08 is: 19,223.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,653 : 25,742.99 = 13,929.08 : x
  2. Step 2: Convert to fraction form
    18,653/25,742.99 = 13,929.08/x
  3. Step 3: Cross multiply
    18,653x = 25,742.99 × 13,929.08
  4. Step 4: Simplify right side
    18,653x = 358,576,167.15
  5. Step 5: Solve for x
    x = 358,576,167.15/18,653
  6. Step 6: Final answer
    x = 19,223.51

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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.