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Finding the Fourth Proportional to 18,710.21, 25,820.55 and 10,645.18

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Solution

The fourth proportional to 18,710.21, 25,820.55 and 10,645.18 is: 14,690.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,710.21 : 25,820.55 = 10,645.18 : x
  2. Step 2: Convert to fraction form
    18,710.21/25,820.55 = 10,645.18/x
  3. Step 3: Cross multiply
    18,710.21x = 25,820.55 × 10,645.18
  4. Step 4: Simplify right side
    18,710.21x = 274,864,337.90
  5. Step 5: Solve for x
    x = 274,864,337.90/18,710.21
  6. Step 6: Final answer
    x = 14,690.60

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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.