Home / 9,985.18-13,784.08-7,115.76

Finding the Fourth Proportional to 9,985.18, 13,784.08 and 7,115.76

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Solution

The fourth proportional to 9,985.18, 13,784.08 and 7,115.76 is: 9,822.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,985.18 : 13,784.08 = 7,115.76 : x
  2. Step 2: Convert to fraction form
    9,985.18/13,784.08 = 7,115.76/x
  3. Step 3: Cross multiply
    9,985.18x = 13,784.08 × 7,115.76
  4. Step 4: Simplify right side
    9,985.18x = 98,084,205.10
  5. Step 5: Solve for x
    x = 98,084,205.10/9,985.18
  6. Step 6: Final answer
    x = 9,822.98

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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.