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Finding the Fourth Proportional to 13,598.15, 20,388.90 and 12,437.93

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Solution

The fourth proportional to 13,598.15, 20,388.90 and 12,437.93 is: 18,649.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,598.15 : 20,388.90 = 12,437.93 : x
  2. Step 2: Convert to fraction form
    13,598.15/20,388.90 = 12,437.93/x
  3. Step 3: Cross multiply
    13,598.15x = 20,388.90 × 12,437.93
  4. Step 4: Simplify right side
    13,598.15x = 253,595,710.98
  5. Step 5: Solve for x
    x = 253,595,710.98/13,598.15
  6. Step 6: Final answer
    x = 18,649.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.