Home / 28,258.39-38,995.81-15,511.56

Finding the Fourth Proportional to 28,258.39, 38,995.81 and 15,511.56

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Solution

The fourth proportional to 28,258.39, 38,995.81 and 15,511.56 is: 21,405.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,258.39 : 38,995.81 = 15,511.56 : x
  2. Step 2: Convert to fraction form
    28,258.39/38,995.81 = 15,511.56/x
  3. Step 3: Cross multiply
    28,258.39x = 38,995.81 × 15,511.56
  4. Step 4: Simplify right side
    28,258.39x = 604,885,846.56
  5. Step 5: Solve for x
    x = 604,885,846.56/28,258.39
  6. Step 6: Final answer
    x = 21,405.53

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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.