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Finding the Fourth Proportional to 18,656.88, 25,768.36 and 12,358.32

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Solution

The fourth proportional to 18,656.88, 25,768.36 and 12,358.32 is: 17,068.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,656.88 : 25,768.36 = 12,358.32 : x
  2. Step 2: Convert to fraction form
    18,656.88/25,768.36 = 12,358.32/x
  3. Step 3: Cross multiply
    18,656.88x = 25,768.36 × 12,358.32
  4. Step 4: Simplify right side
    18,656.88x = 318,453,638.76
  5. Step 5: Solve for x
    x = 318,453,638.76/18,656.88
  6. Step 6: Final answer
    x = 17,068.97

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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.