Home / 21,378.48-29,503.80-13,926.48

Finding the Fourth Proportional to 21,378.48, 29,503.80 and 13,926.48

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Solution

The fourth proportional to 21,378.48, 29,503.80 and 13,926.48 is: 19,219.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.48 : 29,503.80 = 13,926.48 : x
  2. Step 2: Convert to fraction form
    21,378.48/29,503.80 = 13,926.48/x
  3. Step 3: Cross multiply
    21,378.48x = 29,503.80 × 13,926.48
  4. Step 4: Simplify right side
    21,378.48x = 410,884,080.62
  5. Step 5: Solve for x
    x = 410,884,080.62/21,378.48
  6. Step 6: Final answer
    x = 19,219.52

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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.