Home / 15,780.58-21,776.47-9,061.48

Finding the Fourth Proportional to 15,780.58, 21,776.47 and 9,061.48

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Solution

The fourth proportional to 15,780.58, 21,776.47 and 9,061.48 is: 12,504.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,780.58 : 21,776.47 = 9,061.48 : x
  2. Step 2: Convert to fraction form
    15,780.58/21,776.47 = 9,061.48/x
  3. Step 3: Cross multiply
    15,780.58x = 21,776.47 × 9,061.48
  4. Step 4: Simplify right side
    15,780.58x = 197,326,970.28
  5. Step 5: Solve for x
    x = 197,326,970.28/15,780.58
  6. Step 6: Final answer
    x = 12,504.42

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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.