Home / 20,612.40-28,465.32-14,255.28

Finding the Fourth Proportional to 20,612.40, 28,465.32 and 14,255.28

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Solution

The fourth proportional to 20,612.40, 28,465.32 and 14,255.28 is: 19,686.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612.40 : 28,465.32 = 14,255.28 : x
  2. Step 2: Convert to fraction form
    20,612.40/28,465.32 = 14,255.28/x
  3. Step 3: Cross multiply
    20,612.40x = 28,465.32 × 14,255.28
  4. Step 4: Simplify right side
    20,612.40x = 405,781,106.89
  5. Step 5: Solve for x
    x = 405,781,106.89/20,612.40
  6. Step 6: Final answer
    x = 19,686.26

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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.