Home / 21,730.16-29,988.08-13,232.64

Finding the Fourth Proportional to 21,730.16, 29,988.08 and 13,232.64

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Solution

The fourth proportional to 21,730.16, 29,988.08 and 13,232.64 is: 18,261.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,730.16 : 29,988.08 = 13,232.64 : x
  2. Step 2: Convert to fraction form
    21,730.16/29,988.08 = 13,232.64/x
  3. Step 3: Cross multiply
    21,730.16x = 29,988.08 × 13,232.64
  4. Step 4: Simplify right side
    21,730.16x = 396,821,466.93
  5. Step 5: Solve for x
    x = 396,821,466.93/21,730.16
  6. Step 6: Final answer
    x = 18,261.32

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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.