Home / 22,219.89-30,666.15-12,788.25

Finding the Fourth Proportional to 22,219.89, 30,666.15 and 12,788.25

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Solution

The fourth proportional to 22,219.89, 30,666.15 and 12,788.25 is: 17,649.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,219.89 : 30,666.15 = 12,788.25 : x
  2. Step 2: Convert to fraction form
    22,219.89/30,666.15 = 12,788.25/x
  3. Step 3: Cross multiply
    22,219.89x = 30,666.15 × 12,788.25
  4. Step 4: Simplify right side
    22,219.89x = 392,166,392.74
  5. Step 5: Solve for x
    x = 392,166,392.74/22,219.89
  6. Step 6: Final answer
    x = 17,649.34

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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.