Home / 9,985.47-13,788.81-6,215.10

Finding the Fourth Proportional to 9,985.47, 13,788.81 and 6,215.10

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Solution

The fourth proportional to 9,985.47, 13,788.81 and 6,215.10 is: 8,582.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,985.47 : 13,788.81 = 6,215.10 : x
  2. Step 2: Convert to fraction form
    9,985.47/13,788.81 = 6,215.10/x
  3. Step 3: Cross multiply
    9,985.47x = 13,788.81 × 6,215.10
  4. Step 4: Simplify right side
    9,985.47x = 85,698,833.03
  5. Step 5: Solve for x
    x = 85,698,833.03/9,985.47
  6. Step 6: Final answer
    x = 8,582.35

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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.