Home / 20,715.48-28,578.26-13,998.66

Finding the Fourth Proportional to 20,715.48, 28,578.26 and 13,998.66

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Solution

The fourth proportional to 20,715.48, 28,578.26 and 13,998.66 is: 19,312.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.48 : 28,578.26 = 13,998.66 : x
  2. Step 2: Convert to fraction form
    20,715.48/28,578.26 = 13,998.66/x
  3. Step 3: Cross multiply
    20,715.48x = 28,578.26 × 13,998.66
  4. Step 4: Simplify right side
    20,715.48x = 400,057,275.14
  5. Step 5: Solve for x
    x = 400,057,275.14/20,715.48
  6. Step 6: Final answer
    x = 19,312.00

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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.