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Finding the Fourth Proportional to 18,411.70, 25,408.30 and 10,345.52

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Solution

The fourth proportional to 18,411.70, 25,408.30 and 10,345.52 is: 14,276.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,411.70 : 25,408.30 = 10,345.52 : x
  2. Step 2: Convert to fraction form
    18,411.70/25,408.30 = 10,345.52/x
  3. Step 3: Cross multiply
    18,411.70x = 25,408.30 × 10,345.52
  4. Step 4: Simplify right side
    18,411.70x = 262,862,075.82
  5. Step 5: Solve for x
    x = 262,862,075.82/18,411.70
  6. Step 6: Final answer
    x = 14,276.90

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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.