Home / 13,698.78-20,535.72-4,931.70

Finding the Fourth Proportional to 13,698.78, 20,535.72 and 4,931.70

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Solution

The fourth proportional to 13,698.78, 20,535.72 and 4,931.70 is: 7,393.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,698.78 : 20,535.72 = 4,931.70 : x
  2. Step 2: Convert to fraction form
    13,698.78/20,535.72 = 4,931.70/x
  3. Step 3: Cross multiply
    13,698.78x = 20,535.72 × 4,931.70
  4. Step 4: Simplify right side
    13,698.78x = 101,276,010.32
  5. Step 5: Solve for x
    x = 101,276,010.32/13,698.78
  6. Step 6: Final answer
    x = 7,393.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.