Home / 15,533.99-21,439.69-9,160.20

Finding the Fourth Proportional to 15,533.99, 21,439.69 and 9,160.20

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Solution

The fourth proportional to 15,533.99, 21,439.69 and 9,160.20 is: 12,642.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,533.99 : 21,439.69 = 9,160.20 : x
  2. Step 2: Convert to fraction form
    15,533.99/21,439.69 = 9,160.20/x
  3. Step 3: Cross multiply
    15,533.99x = 21,439.69 × 9,160.20
  4. Step 4: Simplify right side
    15,533.99x = 196,391,816.73
  5. Step 5: Solve for x
    x = 196,391,816.73/15,533.99
  6. Step 6: Final answer
    x = 12,642.71

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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.