Home / 13,210.89-19,713.85-11,808.78

Finding the Fourth Proportional to 13,210.89, 19,713.85 and 11,808.78

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Solution

The fourth proportional to 13,210.89, 19,713.85 and 11,808.78 is: 17,621.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,210.89 : 19,713.85 = 11,808.78 : x
  2. Step 2: Convert to fraction form
    13,210.89/19,713.85 = 11,808.78/x
  3. Step 3: Cross multiply
    13,210.89x = 19,713.85 × 11,808.78
  4. Step 4: Simplify right side
    13,210.89x = 232,796,359.99
  5. Step 5: Solve for x
    x = 232,796,359.99/13,210.89
  6. Step 6: Final answer
    x = 17,621.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.