Home / 15,653.80-21,589.59-9,681.28

Finding the Fourth Proportional to 15,653.80, 21,589.59 and 9,681.28

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Solution

The fourth proportional to 15,653.80, 21,589.59 and 9,681.28 is: 13,352.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,653.80 : 21,589.59 = 9,681.28 : x
  2. Step 2: Convert to fraction form
    15,653.80/21,589.59 = 9,681.28/x
  3. Step 3: Cross multiply
    15,653.80x = 21,589.59 × 9,681.28
  4. Step 4: Simplify right side
    15,653.80x = 209,014,865.88
  5. Step 5: Solve for x
    x = 209,014,865.88/15,653.80
  6. Step 6: Final answer
    x = 13,352.34

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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.