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Finding the Fourth Proportional to 19,681.68, 27,160.72 and 10,728.99

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Solution

The fourth proportional to 19,681.68, 27,160.72 and 10,728.99 is: 14,806.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,681.68 : 27,160.72 = 10,728.99 : x
  2. Step 2: Convert to fraction form
    19,681.68/27,160.72 = 10,728.99/x
  3. Step 3: Cross multiply
    19,681.68x = 27,160.72 × 10,728.99
  4. Step 4: Simplify right side
    19,681.68x = 291,407,066.45
  5. Step 5: Solve for x
    x = 291,407,066.45/19,681.68
  6. Step 6: Final answer
    x = 14,806.00

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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.