Home / 28,002.75-38,643.80-15,427.77

Finding the Fourth Proportional to 28,002.75, 38,643.80 and 15,427.77

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Solution

The fourth proportional to 28,002.75, 38,643.80 and 15,427.77 is: 21,290.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,002.75 : 38,643.80 = 15,427.77 : x
  2. Step 2: Convert to fraction form
    28,002.75/38,643.80 = 15,427.77/x
  3. Step 3: Cross multiply
    28,002.75x = 38,643.80 × 15,427.77
  4. Step 4: Simplify right side
    28,002.75x = 596,187,581.19
  5. Step 5: Solve for x
    x = 596,187,581.19/28,002.75
  6. Step 6: Final answer
    x = 21,290.32

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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.