Home / 13,991.95-19,312.19-8,690.77

Finding the Fourth Proportional to 13,991.95, 19,312.19 and 8,690.77

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Solution

The fourth proportional to 13,991.95, 19,312.19 and 8,690.77 is: 11,995.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,991.95 : 19,312.19 = 8,690.77 : x
  2. Step 2: Convert to fraction form
    13,991.95/19,312.19 = 8,690.77/x
  3. Step 3: Cross multiply
    13,991.95x = 19,312.19 × 8,690.77
  4. Step 4: Simplify right side
    13,991.95x = 167,837,801.49
  5. Step 5: Solve for x
    x = 167,837,801.49/13,991.95
  6. Step 6: Final answer
    x = 11,995.31

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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.