Home / 20,430.32-28,128.67-17,434.13

Finding the Fourth Proportional to 20,430.32, 28,128.67 and 17,434.13

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Solution

The fourth proportional to 20,430.32, 28,128.67 and 17,434.13 is: 24,003.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.32 : 28,128.67 = 17,434.13 : x
  2. Step 2: Convert to fraction form
    20,430.32/28,128.67 = 17,434.13/x
  3. Step 3: Cross multiply
    20,430.32x = 28,128.67 × 17,434.13
  4. Step 4: Simplify right side
    20,430.32x = 490,398,732.01
  5. Step 5: Solve for x
    x = 490,398,732.01/20,430.32
  6. Step 6: Final answer
    x = 24,003.48

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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.