Home / 15,523.61-21,381.77-11,931.70

Finding the Fourth Proportional to 15,523.61, 21,381.77 and 11,931.70

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Solution

The fourth proportional to 15,523.61, 21,381.77 and 11,931.70 is: 16,434.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,523.61 : 21,381.77 = 11,931.70 : x
  2. Step 2: Convert to fraction form
    15,523.61/21,381.77 = 11,931.70/x
  3. Step 3: Cross multiply
    15,523.61x = 21,381.77 × 11,931.70
  4. Step 4: Simplify right side
    15,523.61x = 255,120,698.54
  5. Step 5: Solve for x
    x = 255,120,698.54/15,523.61
  6. Step 6: Final answer
    x = 16,434.37

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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.