Home / 13,875.36-19,149.84-8,921.76

Finding the Fourth Proportional to 13,875.36, 19,149.84 and 8,921.76

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Solution

The fourth proportional to 13,875.36, 19,149.84 and 8,921.76 is: 12,313.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,875.36 : 19,149.84 = 8,921.76 : x
  2. Step 2: Convert to fraction form
    13,875.36/19,149.84 = 8,921.76/x
  3. Step 3: Cross multiply
    13,875.36x = 19,149.84 × 8,921.76
  4. Step 4: Simplify right side
    13,875.36x = 170,850,276.52
  5. Step 5: Solve for x
    x = 170,850,276.52/13,875.36
  6. Step 6: Final answer
    x = 12,313.21

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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.