Home / 9,985.02-13,781.21-6,209.71

Finding the Fourth Proportional to 9,985.02, 13,781.21 and 6,209.71

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Solution

The fourth proportional to 9,985.02, 13,781.21 and 6,209.71 is: 8,570.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,985.02 : 13,781.21 = 6,209.71 : x
  2. Step 2: Convert to fraction form
    9,985.02/13,781.21 = 6,209.71/x
  3. Step 3: Cross multiply
    9,985.02x = 13,781.21 × 6,209.71
  4. Step 4: Simplify right side
    9,985.02x = 85,577,381.96
  5. Step 5: Solve for x
    x = 85,577,381.96/9,985.02
  6. Step 6: Final answer
    x = 8,570.58

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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.