Home / 28,638.36-42,971.58-21,661.02

Finding the Fourth Proportional to 28,638.36, 42,971.58 and 21,661.02

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Solution

The fourth proportional to 28,638.36, 42,971.58 and 21,661.02 is: 32,502.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,638.36 : 42,971.58 = 21,661.02 : x
  2. Step 2: Convert to fraction form
    28,638.36/42,971.58 = 21,661.02/x
  3. Step 3: Cross multiply
    28,638.36x = 42,971.58 × 21,661.02
  4. Step 4: Simplify right side
    28,638.36x = 930,808,253.81
  5. Step 5: Solve for x
    x = 930,808,253.81/28,638.36
  6. Step 6: Final answer
    x = 32,502.15

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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.