Home / 38,721.04-53,430.64-21,722.99

Finding the Fourth Proportional to 38,721.04, 53,430.64 and 21,722.99

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Solution

The fourth proportional to 38,721.04, 53,430.64 and 21,722.99 is: 29,975.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,721.04 : 53,430.64 = 21,722.99 : x
  2. Step 2: Convert to fraction form
    38,721.04/53,430.64 = 21,722.99/x
  3. Step 3: Cross multiply
    38,721.04x = 53,430.64 × 21,722.99
  4. Step 4: Simplify right side
    38,721.04x = 1,160,672,936.95
  5. Step 5: Solve for x
    x = 1,160,672,936.95/38,721.04
  6. Step 6: Final answer
    x = 29,975.25

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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.