Home / 15,445.79-21,317.46-9,781.05

Finding the Fourth Proportional to 15,445.79, 21,317.46 and 9,781.05

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Solution

The fourth proportional to 15,445.79, 21,317.46 and 9,781.05 is: 13,499.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,445.79 : 21,317.46 = 9,781.05 : x
  2. Step 2: Convert to fraction form
    15,445.79/21,317.46 = 9,781.05/x
  3. Step 3: Cross multiply
    15,445.79x = 21,317.46 × 9,781.05
  4. Step 4: Simplify right side
    15,445.79x = 208,507,093.23
  5. Step 5: Solve for x
    x = 208,507,093.23/15,445.79
  6. Step 6: Final answer
    x = 13,499.29

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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.