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Finding the Fourth Proportional to 19,345.98, 26,712.81 and 15,557.00

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Solution

The fourth proportional to 19,345.98, 26,712.81 and 15,557.00 is: 21,481.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,345.98 : 26,712.81 = 15,557.00 : x
  2. Step 2: Convert to fraction form
    19,345.98/26,712.81 = 15,557.00/x
  3. Step 3: Cross multiply
    19,345.98x = 26,712.81 × 15,557.00
  4. Step 4: Simplify right side
    19,345.98x = 415,571,251.95
  5. Step 5: Solve for x
    x = 415,571,251.95/19,345.98
  6. Step 6: Final answer
    x = 21,481.01

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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.