Home / 19,905.70-29,831.55-12,864.10

Finding the Fourth Proportional to 19,905.70, 29,831.55 and 12,864.10

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Solution

The fourth proportional to 19,905.70, 29,831.55 and 12,864.10 is: 19,278.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,905.70 : 29,831.55 = 12,864.10 : x
  2. Step 2: Convert to fraction form
    19,905.70/29,831.55 = 12,864.10/x
  3. Step 3: Cross multiply
    19,905.70x = 29,831.55 × 12,864.10
  4. Step 4: Simplify right side
    19,905.70x = 383,756,042.36
  5. Step 5: Solve for x
    x = 383,756,042.36/19,905.70
  6. Step 6: Final answer
    x = 19,278.70

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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.