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Finding the Fourth Proportional to 19,803.40, 29,599.73 and 13,971.40

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Solution

The fourth proportional to 19,803.40, 29,599.73 and 13,971.40 is: 20,882.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,803.40 : 29,599.73 = 13,971.40 : x
  2. Step 2: Convert to fraction form
    19,803.40/29,599.73 = 13,971.40/x
  3. Step 3: Cross multiply
    19,803.40x = 29,599.73 × 13,971.40
  4. Step 4: Simplify right side
    19,803.40x = 413,549,667.72
  5. Step 5: Solve for x
    x = 413,549,667.72/19,803.40
  6. Step 6: Final answer
    x = 20,882.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.