Home / 12,875.71-19,280.54-8,921.35

Finding the Fourth Proportional to 12,875.71, 19,280.54 and 8,921.35

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Solution

The fourth proportional to 12,875.71, 19,280.54 and 8,921.35 is: 13,359.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,875.71 : 19,280.54 = 8,921.35 : x
  2. Step 2: Convert to fraction form
    12,875.71/19,280.54 = 8,921.35/x
  3. Step 3: Cross multiply
    12,875.71x = 19,280.54 × 8,921.35
  4. Step 4: Simplify right side
    12,875.71x = 172,008,400.92
  5. Step 5: Solve for x
    x = 172,008,400.92/12,875.71
  6. Step 6: Final answer
    x = 13,359.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.