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Finding the Fourth Proportional to 19,398.98, 26,780.81 and 13,058.91

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Solution

The fourth proportional to 19,398.98, 26,780.81 and 13,058.91 is: 18,028.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,398.98 : 26,780.81 = 13,058.91 : x
  2. Step 2: Convert to fraction form
    19,398.98/26,780.81 = 13,058.91/x
  3. Step 3: Cross multiply
    19,398.98x = 26,780.81 × 13,058.91
  4. Step 4: Simplify right side
    19,398.98x = 349,727,988.32
  5. Step 5: Solve for x
    x = 349,727,988.32/19,398.98
  6. Step 6: Final answer
    x = 18,028.17

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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.