Home / 21,141.81-31,716.90-9,455.13

Finding the Fourth Proportional to 21,141.81, 31,716.90 and 9,455.13

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Solution

The fourth proportional to 21,141.81, 31,716.90 and 9,455.13 is: 14,184.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,141.81 : 31,716.90 = 9,455.13 : x
  2. Step 2: Convert to fraction form
    21,141.81/31,716.90 = 9,455.13/x
  3. Step 3: Cross multiply
    21,141.81x = 31,716.90 × 9,455.13
  4. Step 4: Simplify right side
    21,141.81x = 299,887,412.70
  5. Step 5: Solve for x
    x = 299,887,412.70/21,141.81
  6. Step 6: Final answer
    x = 14,184.57

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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.