Home / 15,782.22-21,810.81-12,945.18

Finding the Fourth Proportional to 15,782.22, 21,810.81 and 12,945.18

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Solution

The fourth proportional to 15,782.22, 21,810.81 and 12,945.18 is: 17,890.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,782.22 : 21,810.81 = 12,945.18 : x
  2. Step 2: Convert to fraction form
    15,782.22/21,810.81 = 12,945.18/x
  3. Step 3: Cross multiply
    15,782.22x = 21,810.81 × 12,945.18
  4. Step 4: Simplify right side
    15,782.22x = 282,344,861.40
  5. Step 5: Solve for x
    x = 282,344,861.40/15,782.22
  6. Step 6: Final answer
    x = 17,890.06

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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.