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Finding the Fourth Proportional to 13,058.15, 18,019.96 and 7,089.77

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Solution

The fourth proportional to 13,058.15, 18,019.96 and 7,089.77 is: 9,783.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,058.15 : 18,019.96 = 7,089.77 : x
  2. Step 2: Convert to fraction form
    13,058.15/18,019.96 = 7,089.77/x
  3. Step 3: Cross multiply
    13,058.15x = 18,019.96 × 7,089.77
  4. Step 4: Simplify right side
    13,058.15x = 127,757,337.65
  5. Step 5: Solve for x
    x = 127,757,337.65/13,058.15
  6. Step 6: Final answer
    x = 9,783.72

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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.