Home / 28,266.50-39,005.80-15,690.26

Finding the Fourth Proportional to 28,266.50, 39,005.80 and 15,690.26

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Solution

The fourth proportional to 28,266.50, 39,005.80 and 15,690.26 is: 21,651.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,266.50 : 39,005.80 = 15,690.26 : x
  2. Step 2: Convert to fraction form
    28,266.50/39,005.80 = 15,690.26/x
  3. Step 3: Cross multiply
    28,266.50x = 39,005.80 × 15,690.26
  4. Step 4: Simplify right side
    28,266.50x = 612,011,143.51
  5. Step 5: Solve for x
    x = 612,011,143.51/28,266.50
  6. Step 6: Final answer
    x = 21,651.47

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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.