Home / 15,783.60-21,755.79-13,734.25

Finding the Fourth Proportional to 15,783.60, 21,755.79 and 13,734.25

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Solution

The fourth proportional to 15,783.60, 21,755.79 and 13,734.25 is: 18,931.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,783.60 : 21,755.79 = 13,734.25 : x
  2. Step 2: Convert to fraction form
    15,783.60/21,755.79 = 13,734.25/x
  3. Step 3: Cross multiply
    15,783.60x = 21,755.79 × 13,734.25
  4. Step 4: Simplify right side
    15,783.60x = 298,799,458.81
  5. Step 5: Solve for x
    x = 298,799,458.81/15,783.60
  6. Step 6: Final answer
    x = 18,931.01

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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.