Home / 39,653.15-54,721.40-21,748.28

Finding the Fourth Proportional to 39,653.15, 54,721.40 and 21,748.28

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Solution

The fourth proportional to 39,653.15, 54,721.40 and 21,748.28 is: 30,012.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,653.15 : 54,721.40 = 21,748.28 : x
  2. Step 2: Convert to fraction form
    39,653.15/54,721.40 = 21,748.28/x
  3. Step 3: Cross multiply
    39,653.15x = 54,721.40 × 21,748.28
  4. Step 4: Simplify right side
    39,653.15x = 1,190,095,946.84
  5. Step 5: Solve for x
    x = 1,190,095,946.84/39,653.15
  6. Step 6: Final answer
    x = 30,012.65

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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.