Home / 19,155.60-26,445.60-12,780.48

Finding the Fourth Proportional to 19,155.60, 26,445.60 and 12,780.48

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Solution

The fourth proportional to 19,155.60, 26,445.60 and 12,780.48 is: 17,644.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,155.60 : 26,445.60 = 12,780.48 : x
  2. Step 2: Convert to fraction form
    19,155.60/26,445.60 = 12,780.48/x
  3. Step 3: Cross multiply
    19,155.60x = 26,445.60 × 12,780.48
  4. Step 4: Simplify right side
    19,155.60x = 337,987,461.89
  5. Step 5: Solve for x
    x = 337,987,461.89/19,155.60
  6. Step 6: Final answer
    x = 17,644.32

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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.