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Finding the Fourth Proportional to 18,388.63, 25,368.69 and 12,013.03

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Solution

The fourth proportional to 18,388.63, 25,368.69 and 12,013.03 is: 16,573.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,388.63 : 25,368.69 = 12,013.03 : x
  2. Step 2: Convert to fraction form
    18,388.63/25,368.69 = 12,013.03/x
  3. Step 3: Cross multiply
    18,388.63x = 25,368.69 × 12,013.03
  4. Step 4: Simplify right side
    18,388.63x = 304,754,834.03
  5. Step 5: Solve for x
    x = 304,754,834.03/18,388.63
  6. Step 6: Final answer
    x = 16,573.00

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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.