Home / 20,820.63-28,746.32-12,325.48

Finding the Fourth Proportional to 20,820.63, 28,746.32 and 12,325.48

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Solution

The fourth proportional to 20,820.63, 28,746.32 and 12,325.48 is: 17,017.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.63 : 28,746.32 = 12,325.48 : x
  2. Step 2: Convert to fraction form
    20,820.63/28,746.32 = 12,325.48/x
  3. Step 3: Cross multiply
    20,820.63x = 28,746.32 × 12,325.48
  4. Step 4: Simplify right side
    20,820.63x = 354,312,223.05
  5. Step 5: Solve for x
    x = 354,312,223.05/20,820.63
  6. Step 6: Final answer
    x = 17,017.37

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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.