Home / 28,345.47-42,518.20-20,124.74

Finding the Fourth Proportional to 28,345.47, 42,518.20 and 20,124.74

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Solution

The fourth proportional to 28,345.47, 42,518.20 and 20,124.74 is: 30,187.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,345.47 : 42,518.20 = 20,124.74 : x
  2. Step 2: Convert to fraction form
    28,345.47/42,518.20 = 20,124.74/x
  3. Step 3: Cross multiply
    28,345.47x = 42,518.20 × 20,124.74
  4. Step 4: Simplify right side
    28,345.47x = 855,667,776.25
  5. Step 5: Solve for x
    x = 855,667,776.25/28,345.47
  6. Step 6: Final answer
    x = 30,187.11

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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.