Home / 19,680.57-27,158.85-10,728.15

Finding the Fourth Proportional to 19,680.57, 27,158.85 and 10,728.15

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Solution

The fourth proportional to 19,680.57, 27,158.85 and 10,728.15 is: 14,804.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,680.57 : 27,158.85 = 10,728.15 : x
  2. Step 2: Convert to fraction form
    19,680.57/27,158.85 = 10,728.15/x
  3. Step 3: Cross multiply
    19,680.57x = 27,158.85 × 10,728.15
  4. Step 4: Simplify right side
    19,680.57x = 291,364,216.63
  5. Step 5: Solve for x
    x = 291,364,216.63/19,680.57
  6. Step 6: Final answer
    x = 14,804.66

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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.