Home / 28,683.96-39,572.78-21,148.20

Finding the Fourth Proportional to 28,683.96, 39,572.78 and 21,148.20

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Solution

The fourth proportional to 28,683.96, 39,572.78 and 21,148.20 is: 29,176.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,683.96 : 39,572.78 = 21,148.20 : x
  2. Step 2: Convert to fraction form
    28,683.96/39,572.78 = 21,148.20/x
  3. Step 3: Cross multiply
    28,683.96x = 39,572.78 × 21,148.20
  4. Step 4: Simplify right side
    28,683.96x = 836,893,066.00
  5. Step 5: Solve for x
    x = 836,893,066.00/28,683.96
  6. Step 6: Final answer
    x = 29,176.34

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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.