Home / 20,938.98-28,887.81-15,501

Finding the Fourth Proportional to 20,938.98, 28,887.81 and 15,501

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Solution

The fourth proportional to 20,938.98, 28,887.81 and 15,501 is: 21,385.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.98 : 28,887.81 = 15,501 : x
  2. Step 2: Convert to fraction form
    20,938.98/28,887.81 = 15,501/x
  3. Step 3: Cross multiply
    20,938.98x = 28,887.81 × 15,501
  4. Step 4: Simplify right side
    20,938.98x = 447,789,942.81
  5. Step 5: Solve for x
    x = 447,789,942.81/20,938.98
  6. Step 6: Final answer
    x = 21,385.47

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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.