Home / 13,680.51-20,520.02-4,192.81

Finding the Fourth Proportional to 13,680.51, 20,520.02 and 4,192.81

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Solution

The fourth proportional to 13,680.51, 20,520.02 and 4,192.81 is: 6,288.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.51 : 20,520.02 = 4,192.81 : x
  2. Step 2: Convert to fraction form
    13,680.51/20,520.02 = 4,192.81/x
  3. Step 3: Cross multiply
    13,680.51x = 20,520.02 × 4,192.81
  4. Step 4: Simplify right side
    13,680.51x = 86,036,596.08
  5. Step 5: Solve for x
    x = 86,036,596.08/13,680.51
  6. Step 6: Final answer
    x = 6,288.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.