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Finding the Fourth Proportional to 19,505.88, 26,921.13 and 12,810.93

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Solution

The fourth proportional to 19,505.88, 26,921.13 and 12,810.93 is: 17,681.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,505.88 : 26,921.13 = 12,810.93 : x
  2. Step 2: Convert to fraction form
    19,505.88/26,921.13 = 12,810.93/x
  3. Step 3: Cross multiply
    19,505.88x = 26,921.13 × 12,810.93
  4. Step 4: Simplify right side
    19,505.88x = 344,884,711.95
  5. Step 5: Solve for x
    x = 344,884,711.95/19,505.88
  6. Step 6: Final answer
    x = 17,681.06

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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.