Home / 15,810.51-21,818.57-8,640.57

Finding the Fourth Proportional to 15,810.51, 21,818.57 and 8,640.57

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Solution

The fourth proportional to 15,810.51, 21,818.57 and 8,640.57 is: 11,924.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,810.51 : 21,818.57 = 8,640.57 : x
  2. Step 2: Convert to fraction form
    15,810.51/21,818.57 = 8,640.57/x
  3. Step 3: Cross multiply
    15,810.51x = 21,818.57 × 8,640.57
  4. Step 4: Simplify right side
    15,810.51x = 188,524,881.38
  5. Step 5: Solve for x
    x = 188,524,881.38/15,810.51
  6. Step 6: Final answer
    x = 11,924.02

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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.