Home / 21,920.42-30,242.93-12,359.12

Finding the Fourth Proportional to 21,920.42, 30,242.93 and 12,359.12

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Solution

The fourth proportional to 21,920.42, 30,242.93 and 12,359.12 is: 17,051.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,920.42 : 30,242.93 = 12,359.12 : x
  2. Step 2: Convert to fraction form
    21,920.42/30,242.93 = 12,359.12/x
  3. Step 3: Cross multiply
    21,920.42x = 30,242.93 × 12,359.12
  4. Step 4: Simplify right side
    21,920.42x = 373,775,788.01
  5. Step 5: Solve for x
    x = 373,775,788.01/21,920.42
  6. Step 6: Final answer
    x = 17,051.49

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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.