Home / 21,140.55-31,688.69-7,097.13

Finding the Fourth Proportional to 21,140.55, 31,688.69 and 7,097.13

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Solution

The fourth proportional to 21,140.55, 31,688.69 and 7,097.13 is: 10,638.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.55 : 31,688.69 = 7,097.13 : x
  2. Step 2: Convert to fraction form
    21,140.55/31,688.69 = 7,097.13/x
  3. Step 3: Cross multiply
    21,140.55x = 31,688.69 × 7,097.13
  4. Step 4: Simplify right side
    21,140.55x = 224,898,716.97
  5. Step 5: Solve for x
    x = 224,898,716.97/21,140.55
  6. Step 6: Final answer
    x = 10,638.26

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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.