Home / 15,423.40-21,247.81-12,716.99

Finding the Fourth Proportional to 15,423.40, 21,247.81 and 12,716.99

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Solution

The fourth proportional to 15,423.40, 21,247.81 and 12,716.99 is: 17,519.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,423.40 : 21,247.81 = 12,716.99 : x
  2. Step 2: Convert to fraction form
    15,423.40/21,247.81 = 12,716.99/x
  3. Step 3: Cross multiply
    15,423.40x = 21,247.81 × 12,716.99
  4. Step 4: Simplify right side
    15,423.40x = 270,208,187.29
  5. Step 5: Solve for x
    x = 270,208,187.29/15,423.40
  6. Step 6: Final answer
    x = 17,519.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.