Home / 15,438.69-21,308.47-8,724.40

Finding the Fourth Proportional to 15,438.69, 21,308.47 and 8,724.40

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Solution

The fourth proportional to 15,438.69, 21,308.47 and 8,724.40 is: 12,041.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,438.69 : 21,308.47 = 8,724.40 : x
  2. Step 2: Convert to fraction form
    15,438.69/21,308.47 = 8,724.40/x
  3. Step 3: Cross multiply
    15,438.69x = 21,308.47 × 8,724.40
  4. Step 4: Simplify right side
    15,438.69x = 185,903,540.59
  5. Step 5: Solve for x
    x = 185,903,540.59/15,438.69
  6. Step 6: Final answer
    x = 12,041.41

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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.