Home / 21,348.22-29,460.56-11,916.78

Finding the Fourth Proportional to 21,348.22, 29,460.56 and 11,916.78

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Solution

The fourth proportional to 21,348.22, 29,460.56 and 11,916.78 is: 16,445.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,348.22 : 29,460.56 = 11,916.78 : x
  2. Step 2: Convert to fraction form
    21,348.22/29,460.56 = 11,916.78/x
  3. Step 3: Cross multiply
    21,348.22x = 29,460.56 × 11,916.78
  4. Step 4: Simplify right side
    21,348.22x = 351,075,012.20
  5. Step 5: Solve for x
    x = 351,075,012.20/21,348.22
  6. Step 6: Final answer
    x = 16,445.17

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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.