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Finding the Fourth Proportional to 38,698.45, 53,404.46 and 21,706.46

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Solution

The fourth proportional to 38,698.45, 53,404.46 and 21,706.46 is: 29,955.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,698.45 : 53,404.46 = 21,706.46 : x
  2. Step 2: Convert to fraction form
    38,698.45/53,404.46 = 21,706.46/x
  3. Step 3: Cross multiply
    38,698.45x = 53,404.46 × 21,706.46
  4. Step 4: Simplify right side
    38,698.45x = 1,159,221,881.19
  5. Step 5: Solve for x
    x = 1,159,221,881.19/38,698.45
  6. Step 6: Final answer
    x = 29,955.26

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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.