Home / 20,871.58-31,317.65-9,776.35

Finding the Fourth Proportional to 20,871.58, 31,317.65 and 9,776.35

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Solution

The fourth proportional to 20,871.58, 31,317.65 and 9,776.35 is: 14,669.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.58 : 31,317.65 = 9,776.35 : x
  2. Step 2: Convert to fraction form
    20,871.58/31,317.65 = 9,776.35/x
  3. Step 3: Cross multiply
    20,871.58x = 31,317.65 × 9,776.35
  4. Step 4: Simplify right side
    20,871.58x = 306,172,307.58
  5. Step 5: Solve for x
    x = 306,172,307.58/20,871.58
  6. Step 6: Final answer
    x = 14,669.34

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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.