Home / 21,048.12-31,531.68-13,153.74

Finding the Fourth Proportional to 21,048.12, 31,531.68 and 13,153.74

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Solution

The fourth proportional to 21,048.12, 31,531.68 and 13,153.74 is: 19,705.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,048.12 : 31,531.68 = 13,153.74 : x
  2. Step 2: Convert to fraction form
    21,048.12/31,531.68 = 13,153.74/x
  3. Step 3: Cross multiply
    21,048.12x = 31,531.68 × 13,153.74
  4. Step 4: Simplify right side
    21,048.12x = 414,759,520.48
  5. Step 5: Solve for x
    x = 414,759,520.48/21,048.12
  6. Step 6: Final answer
    x = 19,705.30

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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.