Home / 13,315.72-19,939.51-12,921.61

Finding the Fourth Proportional to 13,315.72, 19,939.51 and 12,921.61

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Solution

The fourth proportional to 13,315.72, 19,939.51 and 12,921.61 is: 19,349.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,315.72 : 19,939.51 = 12,921.61 : x
  2. Step 2: Convert to fraction form
    13,315.72/19,939.51 = 12,921.61/x
  3. Step 3: Cross multiply
    13,315.72x = 19,939.51 × 12,921.61
  4. Step 4: Simplify right side
    13,315.72x = 257,650,571.81
  5. Step 5: Solve for x
    x = 257,650,571.81/13,315.72
  6. Step 6: Final answer
    x = 19,349.35

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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.