Home / 13,980.45-19,288.86-8,312.31

Finding the Fourth Proportional to 13,980.45, 19,288.86 and 8,312.31

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Solution

The fourth proportional to 13,980.45, 19,288.86 and 8,312.31 is: 11,468.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,980.45 : 19,288.86 = 8,312.31 : x
  2. Step 2: Convert to fraction form
    13,980.45/19,288.86 = 8,312.31/x
  3. Step 3: Cross multiply
    13,980.45x = 19,288.86 × 8,312.31
  4. Step 4: Simplify right side
    13,980.45x = 160,334,983.87
  5. Step 5: Solve for x
    x = 160,334,983.87/13,980.45
  6. Step 6: Final answer
    x = 11,468.51

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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.