Home / 21,730.08-29,995.22-13,228.32

Finding the Fourth Proportional to 21,730.08, 29,995.22 and 13,228.32

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Solution

The fourth proportional to 21,730.08, 29,995.22 and 13,228.32 is: 18,259.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,730.08 : 29,995.22 = 13,228.32 : x
  2. Step 2: Convert to fraction form
    21,730.08/29,995.22 = 13,228.32/x
  3. Step 3: Cross multiply
    21,730.08x = 29,995.22 × 13,228.32
  4. Step 4: Simplify right side
    21,730.08x = 396,786,368.63
  5. Step 5: Solve for x
    x = 396,786,368.63/21,730.08
  6. Step 6: Final answer
    x = 18,259.77

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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.