Home / 15,509.78-21,401.74-8,795.70

Finding the Fourth Proportional to 15,509.78, 21,401.74 and 8,795.70

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Solution

The fourth proportional to 15,509.78, 21,401.74 and 8,795.70 is: 12,137.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,509.78 : 21,401.74 = 8,795.70 : x
  2. Step 2: Convert to fraction form
    15,509.78/21,401.74 = 8,795.70/x
  3. Step 3: Cross multiply
    15,509.78x = 21,401.74 × 8,795.70
  4. Step 4: Simplify right side
    15,509.78x = 188,243,284.52
  5. Step 5: Solve for x
    x = 188,243,284.52/15,509.78
  6. Step 6: Final answer
    x = 12,137.07

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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.