Home / 21,155.04-29,199.96-12,772.08

Finding the Fourth Proportional to 21,155.04, 29,199.96 and 12,772.08

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Solution

The fourth proportional to 21,155.04, 29,199.96 and 12,772.08 is: 17,629.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.04 : 29,199.96 = 12,772.08 : x
  2. Step 2: Convert to fraction form
    21,155.04/29,199.96 = 12,772.08/x
  3. Step 3: Cross multiply
    21,155.04x = 29,199.96 × 12,772.08
  4. Step 4: Simplify right side
    21,155.04x = 372,944,225.12
  5. Step 5: Solve for x
    x = 372,944,225.12/21,155.04
  6. Step 6: Final answer
    x = 17,629.10

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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.