Home / 15,687.36-21,649.32-9,722.16

Finding the Fourth Proportional to 15,687.36, 21,649.32 and 9,722.16

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Solution

The fourth proportional to 15,687.36, 21,649.32 and 9,722.16 is: 13,417.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,687.36 : 21,649.32 = 9,722.16 : x
  2. Step 2: Convert to fraction form
    15,687.36/21,649.32 = 9,722.16/x
  3. Step 3: Cross multiply
    15,687.36x = 21,649.32 × 9,722.16
  4. Step 4: Simplify right side
    15,687.36x = 210,478,152.93
  5. Step 5: Solve for x
    x = 210,478,152.93/15,687.36
  6. Step 6: Final answer
    x = 13,417.05

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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.