Home / 20,715.17-28,603.78-16,887.40

Finding the Fourth Proportional to 20,715.17, 28,603.78 and 16,887.40

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Solution

The fourth proportional to 20,715.17, 28,603.78 and 16,887.40 is: 23,318.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.17 : 28,603.78 = 16,887.40 : x
  2. Step 2: Convert to fraction form
    20,715.17/28,603.78 = 16,887.40/x
  3. Step 3: Cross multiply
    20,715.17x = 28,603.78 × 16,887.40
  4. Step 4: Simplify right side
    20,715.17x = 483,043,474.37
  5. Step 5: Solve for x
    x = 483,043,474.37/20,715.17
  6. Step 6: Final answer
    x = 23,318.34

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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.