Home / 18,931.66-26,131.80-12,212.10

Finding the Fourth Proportional to 18,931.66, 26,131.80 and 12,212.10

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Solution

The fourth proportional to 18,931.66, 26,131.80 and 12,212.10 is: 16,856.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.66 : 26,131.80 = 12,212.10 : x
  2. Step 2: Convert to fraction form
    18,931.66/26,131.80 = 12,212.10/x
  3. Step 3: Cross multiply
    18,931.66x = 26,131.80 × 12,212.10
  4. Step 4: Simplify right side
    18,931.66x = 319,124,154.78
  5. Step 5: Solve for x
    x = 319,124,154.78/18,931.66
  6. Step 6: Final answer
    x = 16,856.64

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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.