Home / 28,921.84-39,901.08-21,386.32

Finding the Fourth Proportional to 28,921.84, 39,901.08 and 21,386.32

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Solution

The fourth proportional to 28,921.84, 39,901.08 and 21,386.32 is: 29,504.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,921.84 : 39,901.08 = 21,386.32 : x
  2. Step 2: Convert to fraction form
    28,921.84/39,901.08 = 21,386.32/x
  3. Step 3: Cross multiply
    28,921.84x = 39,901.08 × 21,386.32
  4. Step 4: Simplify right side
    28,921.84x = 853,337,265.23
  5. Step 5: Solve for x
    x = 853,337,265.23/28,921.84
  6. Step 6: Final answer
    x = 29,504.94

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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.