Home / 9,985.76-13,780.80-5,738.20

Finding the Fourth Proportional to 9,985.76, 13,780.80 and 5,738.20

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Solution

The fourth proportional to 9,985.76, 13,780.80 and 5,738.20 is: 7,918.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,985.76 : 13,780.80 = 5,738.20 : x
  2. Step 2: Convert to fraction form
    9,985.76/13,780.80 = 5,738.20/x
  3. Step 3: Cross multiply
    9,985.76x = 13,780.80 × 5,738.20
  4. Step 4: Simplify right side
    9,985.76x = 79,076,888.97
  5. Step 5: Solve for x
    x = 79,076,888.97/9,985.76
  6. Step 6: Final answer
    x = 7,918.97

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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.