Home / 9,971.36-15,016.40-8,688.32

Finding the Fourth Proportional to 9,971.36, 15,016.40 and 8,688.32

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Solution

The fourth proportional to 9,971.36, 15,016.40 and 8,688.32 is: 13,084.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,971.36 : 15,016.40 = 8,688.32 : x
  2. Step 2: Convert to fraction form
    9,971.36/15,016.40 = 8,688.32/x
  3. Step 3: Cross multiply
    9,971.36x = 15,016.40 × 8,688.32
  4. Step 4: Simplify right side
    9,971.36x = 130,467,288.45
  5. Step 5: Solve for x
    x = 130,467,288.45/9,971.36
  6. Step 6: Final answer
    x = 13,084.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.