Home / 28,688.64-39,579.21-21,152.85

Finding the Fourth Proportional to 28,688.64, 39,579.21 and 21,152.85

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Solution

The fourth proportional to 28,688.64, 39,579.21 and 21,152.85 is: 29,182.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,688.64 : 39,579.21 = 21,152.85 : x
  2. Step 2: Convert to fraction form
    28,688.64/39,579.21 = 21,152.85/x
  3. Step 3: Cross multiply
    28,688.64x = 39,579.21 × 21,152.85
  4. Step 4: Simplify right side
    28,688.64x = 837,213,092.25
  5. Step 5: Solve for x
    x = 837,213,092.25/28,688.64
  6. Step 6: Final answer
    x = 29,182.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.