Home / 21,014.26-28,991.59-13,459.39

Finding the Fourth Proportional to 21,014.26, 28,991.59 and 13,459.39

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Solution

The fourth proportional to 21,014.26, 28,991.59 and 13,459.39 is: 18,568.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,014.26 : 28,991.59 = 13,459.39 : x
  2. Step 2: Convert to fraction form
    21,014.26/28,991.59 = 13,459.39/x
  3. Step 3: Cross multiply
    21,014.26x = 28,991.59 × 13,459.39
  4. Step 4: Simplify right side
    21,014.26x = 390,209,010.40
  5. Step 5: Solve for x
    x = 390,209,010.40/21,014.26
  6. Step 6: Final answer
    x = 18,568.77

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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.