Home / 15,510.77-21,400.03-8,795.87

Finding the Fourth Proportional to 15,510.77, 21,400.03 and 8,795.87

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Solution

The fourth proportional to 15,510.77, 21,400.03 and 8,795.87 is: 12,135.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,510.77 : 21,400.03 = 8,795.87 : x
  2. Step 2: Convert to fraction form
    15,510.77/21,400.03 = 8,795.87/x
  3. Step 3: Cross multiply
    15,510.77x = 21,400.03 × 8,795.87
  4. Step 4: Simplify right side
    15,510.77x = 188,231,881.88
  5. Step 5: Solve for x
    x = 188,231,881.88/15,510.77
  6. Step 6: Final answer
    x = 12,135.56

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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.