Home / 15,579.05-21,509.39-9,619.47

Finding the Fourth Proportional to 15,579.05, 21,509.39 and 9,619.47

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Solution

The fourth proportional to 15,579.05, 21,509.39 and 9,619.47 is: 13,281.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,579.05 : 21,509.39 = 9,619.47 : x
  2. Step 2: Convert to fraction form
    15,579.05/21,509.39 = 9,619.47/x
  3. Step 3: Cross multiply
    15,579.05x = 21,509.39 × 9,619.47
  4. Step 4: Simplify right side
    15,579.05x = 206,908,955.87
  5. Step 5: Solve for x
    x = 206,908,955.87/15,579.05
  6. Step 6: Final answer
    x = 13,281.23

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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.