Home / 39,145.86-58,666.80-21,330.78

Finding the Fourth Proportional to 39,145.86, 58,666.80 and 21,330.78

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Solution

The fourth proportional to 39,145.86, 58,666.80 and 21,330.78 is: 31,967.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,145.86 : 58,666.80 = 21,330.78 : x
  2. Step 2: Convert to fraction form
    39,145.86/58,666.80 = 21,330.78/x
  3. Step 3: Cross multiply
    39,145.86x = 58,666.80 × 21,330.78
  4. Step 4: Simplify right side
    39,145.86x = 1,251,408,604.10
  5. Step 5: Solve for x
    x = 1,251,408,604.10/39,145.86
  6. Step 6: Final answer
    x = 31,967.84

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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.