Home / 19,520.78-26,931.42-12,810.13

Finding the Fourth Proportional to 19,520.78, 26,931.42 and 12,810.13

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Solution

The fourth proportional to 19,520.78, 26,931.42 and 12,810.13 is: 17,673.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,520.78 : 26,931.42 = 12,810.13 : x
  2. Step 2: Convert to fraction form
    19,520.78/26,931.42 = 12,810.13/x
  3. Step 3: Cross multiply
    19,520.78x = 26,931.42 × 12,810.13
  4. Step 4: Simplify right side
    19,520.78x = 344,994,923.96
  5. Step 5: Solve for x
    x = 344,994,923.96/19,520.78
  6. Step 6: Final answer
    x = 17,673.22

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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.