Home / 21,731.79-30,014.55-14,645.91

Finding the Fourth Proportional to 21,731.79, 30,014.55 and 14,645.91

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Solution

The fourth proportional to 21,731.79, 30,014.55 and 14,645.91 is: 20,227.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,731.79 : 30,014.55 = 14,645.91 : x
  2. Step 2: Convert to fraction form
    21,731.79/30,014.55 = 14,645.91/x
  3. Step 3: Cross multiply
    21,731.79x = 30,014.55 × 14,645.91
  4. Step 4: Simplify right side
    21,731.79x = 439,590,397.99
  5. Step 5: Solve for x
    x = 439,590,397.99/21,731.79
  6. Step 6: Final answer
    x = 20,227.99

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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.