Home / 28,712.24-42,903.64-21,920.24

Finding the Fourth Proportional to 28,712.24, 42,903.64 and 21,920.24

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Solution

The fourth proportional to 28,712.24, 42,903.64 and 21,920.24 is: 32,754.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,712.24 : 42,903.64 = 21,920.24 : x
  2. Step 2: Convert to fraction form
    28,712.24/42,903.64 = 21,920.24/x
  3. Step 3: Cross multiply
    28,712.24x = 42,903.64 × 21,920.24
  4. Step 4: Simplify right side
    28,712.24x = 940,457,979.00
  5. Step 5: Solve for x
    x = 940,457,979.00/28,712.24
  6. Step 6: Final answer
    x = 32,754.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.