Home / 21,254.16-31,860.90-7,923.63

Finding the Fourth Proportional to 21,254.16, 31,860.90 and 7,923.63

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Solution

The fourth proportional to 21,254.16, 31,860.90 and 7,923.63 is: 11,877.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,254.16 : 31,860.90 = 7,923.63 : x
  2. Step 2: Convert to fraction form
    21,254.16/31,860.90 = 7,923.63/x
  3. Step 3: Cross multiply
    21,254.16x = 31,860.90 × 7,923.63
  4. Step 4: Simplify right side
    21,254.16x = 252,453,983.07
  5. Step 5: Solve for x
    x = 252,453,983.07/21,254.16
  6. Step 6: Final answer
    x = 11,877.86

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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.