Home / 13,215.48-19,831.08-5,318.72

Finding the Fourth Proportional to 13,215.48, 19,831.08 and 5,318.72

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Solution

The fourth proportional to 13,215.48, 19,831.08 and 5,318.72 is: 7,981.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.48 : 19,831.08 = 5,318.72 : x
  2. Step 2: Convert to fraction form
    13,215.48/19,831.08 = 5,318.72/x
  3. Step 3: Cross multiply
    13,215.48x = 19,831.08 × 5,318.72
  4. Step 4: Simplify right side
    13,215.48x = 105,475,961.82
  5. Step 5: Solve for x
    x = 105,475,961.82/13,215.48
  6. Step 6: Final answer
    x = 7,981.24

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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.