Home / 21,270.86-31,907.76-7,225.16

Finding the Fourth Proportional to 21,270.86, 31,907.76 and 7,225.16

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Solution

The fourth proportional to 21,270.86, 31,907.76 and 7,225.16 is: 10,838.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.86 : 31,907.76 = 7,225.16 : x
  2. Step 2: Convert to fraction form
    21,270.86/31,907.76 = 7,225.16/x
  3. Step 3: Cross multiply
    21,270.86x = 31,907.76 × 7,225.16
  4. Step 4: Simplify right side
    21,270.86x = 230,538,484.61
  5. Step 5: Solve for x
    x = 230,538,484.61/21,270.86
  6. Step 6: Final answer
    x = 10,838.23

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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.