Home / 15,720.09-21,678.89-10,333.01

Finding the Fourth Proportional to 15,720.09, 21,678.89 and 10,333.01

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Solution

The fourth proportional to 15,720.09, 21,678.89 and 10,333.01 is: 14,249.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,720.09 : 21,678.89 = 10,333.01 : x
  2. Step 2: Convert to fraction form
    15,720.09/21,678.89 = 10,333.01/x
  3. Step 3: Cross multiply
    15,720.09x = 21,678.89 × 10,333.01
  4. Step 4: Simplify right side
    15,720.09x = 224,008,187.16
  5. Step 5: Solve for x
    x = 224,008,187.16/15,720.09
  6. Step 6: Final answer
    x = 14,249.80

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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.