Home / 20,715.96-28,588.32-11,284.50

Finding the Fourth Proportional to 20,715.96, 28,588.32 and 11,284.50

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Solution

The fourth proportional to 20,715.96, 28,588.32 and 11,284.50 is: 15,572.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.96 : 28,588.32 = 11,284.50 : x
  2. Step 2: Convert to fraction form
    20,715.96/28,588.32 = 11,284.50/x
  3. Step 3: Cross multiply
    20,715.96x = 28,588.32 × 11,284.50
  4. Step 4: Simplify right side
    20,715.96x = 322,604,897.04
  5. Step 5: Solve for x
    x = 322,604,897.04/20,715.96
  6. Step 6: Final answer
    x = 15,572.77

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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.