Home / 21,056.63-31,590.41-7,912.76

Finding the Fourth Proportional to 21,056.63, 31,590.41 and 7,912.76

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Solution

The fourth proportional to 21,056.63, 31,590.41 and 7,912.76 is: 11,871.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,056.63 : 31,590.41 = 7,912.76 : x
  2. Step 2: Convert to fraction form
    21,056.63/31,590.41 = 7,912.76/x
  3. Step 3: Cross multiply
    21,056.63x = 31,590.41 × 7,912.76
  4. Step 4: Simplify right side
    21,056.63x = 249,967,135.12
  5. Step 5: Solve for x
    x = 249,967,135.12/21,056.63
  6. Step 6: Final answer
    x = 11,871.19

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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.