Home / 28,688.74-39,579.40-21,152.96

Finding the Fourth Proportional to 28,688.74, 39,579.40 and 21,152.96

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Solution

The fourth proportional to 28,688.74, 39,579.40 and 21,152.96 is: 29,182.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,688.74 : 39,579.40 = 21,152.96 : x
  2. Step 2: Convert to fraction form
    28,688.74/39,579.40 = 21,152.96/x
  3. Step 3: Cross multiply
    28,688.74x = 39,579.40 × 21,152.96
  4. Step 4: Simplify right side
    28,688.74x = 837,221,465.02
  5. Step 5: Solve for x
    x = 837,221,465.02/28,688.74
  6. Step 6: Final answer
    x = 29,182.93

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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.