Home / 21,042.47-31,555.51-7,887.67

Finding the Fourth Proportional to 21,042.47, 31,555.51 and 7,887.67

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Solution

The fourth proportional to 21,042.47, 31,555.51 and 7,887.67 is: 11,828.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,042.47 : 31,555.51 = 7,887.67 : x
  2. Step 2: Convert to fraction form
    21,042.47/31,555.51 = 7,887.67/x
  3. Step 3: Cross multiply
    21,042.47x = 31,555.51 × 7,887.67
  4. Step 4: Simplify right side
    21,042.47x = 248,899,350.95
  5. Step 5: Solve for x
    x = 248,899,350.95/21,042.47
  6. Step 6: Final answer
    x = 11,828.43

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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.