Home / 28,205.52-42,271.71-21,129.76

Finding the Fourth Proportional to 28,205.52, 42,271.71 and 21,129.76

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Solution

The fourth proportional to 28,205.52, 42,271.71 and 21,129.76 is: 31,667.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,205.52 : 42,271.71 = 21,129.76 : x
  2. Step 2: Convert to fraction form
    28,205.52/42,271.71 = 21,129.76/x
  3. Step 3: Cross multiply
    28,205.52x = 42,271.71 × 21,129.76
  4. Step 4: Simplify right side
    28,205.52x = 893,191,087.09
  5. Step 5: Solve for x
    x = 893,191,087.09/28,205.52
  6. Step 6: Final answer
    x = 31,667.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.