Home / 15,285.78-21,094.45-9,977.46

Finding the Fourth Proportional to 15,285.78, 21,094.45 and 9,977.46

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Solution

The fourth proportional to 15,285.78, 21,094.45 and 9,977.46 is: 13,768.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,285.78 : 21,094.45 = 9,977.46 : x
  2. Step 2: Convert to fraction form
    15,285.78/21,094.45 = 9,977.46/x
  3. Step 3: Cross multiply
    15,285.78x = 21,094.45 × 9,977.46
  4. Step 4: Simplify right side
    15,285.78x = 210,469,031.10
  5. Step 5: Solve for x
    x = 210,469,031.10/15,285.78
  6. Step 6: Final answer
    x = 13,768.94

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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.