Home / 28,652.12-42,970.58-20,307.50

Finding the Fourth Proportional to 28,652.12, 42,970.58 and 20,307.50

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Solution

The fourth proportional to 28,652.12, 42,970.58 and 20,307.50 is: 30,455.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,652.12 : 42,970.58 = 20,307.50 : x
  2. Step 2: Convert to fraction form
    28,652.12/42,970.58 = 20,307.50/x
  3. Step 3: Cross multiply
    28,652.12x = 42,970.58 × 20,307.50
  4. Step 4: Simplify right side
    28,652.12x = 872,625,053.35
  5. Step 5: Solve for x
    x = 872,625,053.35/28,652.12
  6. Step 6: Final answer
    x = 30,455.86

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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.