Home / 15,388.40-21,237.72-8,674.16

Finding the Fourth Proportional to 15,388.40, 21,237.72 and 8,674.16

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Solution

The fourth proportional to 15,388.40, 21,237.72 and 8,674.16 is: 11,971.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,388.40 : 21,237.72 = 8,674.16 : x
  2. Step 2: Convert to fraction form
    15,388.40/21,237.72 = 8,674.16/x
  3. Step 3: Cross multiply
    15,388.40x = 21,237.72 × 8,674.16
  4. Step 4: Simplify right side
    15,388.40x = 184,219,381.32
  5. Step 5: Solve for x
    x = 184,219,381.32/15,388.40
  6. Step 6: Final answer
    x = 11,971.31

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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.