Home / 28,155.93-42,221.43-8,430.81

Finding the Fourth Proportional to 28,155.93, 42,221.43 and 8,430.81

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Solution

The fourth proportional to 28,155.93, 42,221.43 and 8,430.81 is: 12,642.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,155.93 : 42,221.43 = 8,430.81 : x
  2. Step 2: Convert to fraction form
    28,155.93/42,221.43 = 8,430.81/x
  3. Step 3: Cross multiply
    28,155.93x = 42,221.43 × 8,430.81
  4. Step 4: Simplify right side
    28,155.93x = 355,960,854.26
  5. Step 5: Solve for x
    x = 355,960,854.26/28,155.93
  6. Step 6: Final answer
    x = 12,642.48

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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.