Home / 20,715.64-28,578.48-13,998.81

Finding the Fourth Proportional to 20,715.64, 28,578.48 and 13,998.81

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Solution

The fourth proportional to 20,715.64, 28,578.48 and 13,998.81 is: 19,312.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.64 : 28,578.48 = 13,998.81 : x
  2. Step 2: Convert to fraction form
    20,715.64/28,578.48 = 13,998.81/x
  3. Step 3: Cross multiply
    20,715.64x = 28,578.48 × 13,998.81
  4. Step 4: Simplify right side
    20,715.64x = 400,064,711.61
  5. Step 5: Solve for x
    x = 400,064,711.61/20,715.64
  6. Step 6: Final answer
    x = 19,312.21

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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.