Home / 21,140.04-31,712.64-9,889.68

Finding the Fourth Proportional to 21,140.04, 31,712.64 and 9,889.68

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Solution

The fourth proportional to 21,140.04, 31,712.64 and 9,889.68 is: 14,835.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.04 : 31,712.64 = 9,889.68 : x
  2. Step 2: Convert to fraction form
    21,140.04/31,712.64 = 9,889.68/x
  3. Step 3: Cross multiply
    21,140.04x = 31,712.64 × 9,889.68
  4. Step 4: Simplify right side
    21,140.04x = 313,627,861.56
  5. Step 5: Solve for x
    x = 313,627,861.56/21,140.04
  6. Step 6: Final answer
    x = 14,835.73

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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.