Home / 19,680.95-27,159.53-10,728.45

Finding the Fourth Proportional to 19,680.95, 27,159.53 and 10,728.45

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Solution

The fourth proportional to 19,680.95, 27,159.53 and 10,728.45 is: 14,805.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,680.95 : 27,159.53 = 10,728.45 : x
  2. Step 2: Convert to fraction form
    19,680.95/27,159.53 = 10,728.45/x
  3. Step 3: Cross multiply
    19,680.95x = 27,159.53 × 10,728.45
  4. Step 4: Simplify right side
    19,680.95x = 291,379,659.63
  5. Step 5: Solve for x
    x = 291,379,659.63/19,680.95
  6. Step 6: Final answer
    x = 14,805.16

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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.