Home / 15,810.57-21,781.47-11,021.81

Finding the Fourth Proportional to 15,810.57, 21,781.47 and 11,021.81

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Solution

The fourth proportional to 15,810.57, 21,781.47 and 11,021.81 is: 15,184.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,810.57 : 21,781.47 = 11,021.81 : x
  2. Step 2: Convert to fraction form
    15,810.57/21,781.47 = 11,021.81/x
  3. Step 3: Cross multiply
    15,810.57x = 21,781.47 × 11,021.81
  4. Step 4: Simplify right side
    15,810.57x = 240,071,114.95
  5. Step 5: Solve for x
    x = 240,071,114.95/15,810.57
  6. Step 6: Final answer
    x = 15,184.22

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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.