Home / 21,237.48-31,870.58-8,089.51

Finding the Fourth Proportional to 21,237.48, 31,870.58 and 8,089.51

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Solution

The fourth proportional to 21,237.48, 31,870.58 and 8,089.51 is: 12,139.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,237.48 : 31,870.58 = 8,089.51 : x
  2. Step 2: Convert to fraction form
    21,237.48/31,870.58 = 8,089.51/x
  3. Step 3: Cross multiply
    21,237.48x = 31,870.58 × 8,089.51
  4. Step 4: Simplify right side
    21,237.48x = 257,817,375.62
  5. Step 5: Solve for x
    x = 257,817,375.62/21,237.48
  6. Step 6: Final answer
    x = 12,139.73

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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.