Home / 15,664.64-21,617.56-9,699.20

Finding the Fourth Proportional to 15,664.64, 21,617.56 and 9,699.20

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Solution

The fourth proportional to 15,664.64, 21,617.56 and 9,699.20 is: 13,385.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,664.64 : 21,617.56 = 9,699.20 : x
  2. Step 2: Convert to fraction form
    15,664.64/21,617.56 = 9,699.20/x
  3. Step 3: Cross multiply
    15,664.64x = 21,617.56 × 9,699.20
  4. Step 4: Simplify right side
    15,664.64x = 209,673,037.95
  5. Step 5: Solve for x
    x = 209,673,037.95/15,664.64
  6. Step 6: Final answer
    x = 13,385.12

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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.