Home / 20,656.51-28,505.85-11,225.07

Finding the Fourth Proportional to 20,656.51, 28,505.85 and 11,225.07

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Solution

The fourth proportional to 20,656.51, 28,505.85 and 11,225.07 is: 15,490.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,656.51 : 28,505.85 = 11,225.07 : x
  2. Step 2: Convert to fraction form
    20,656.51/28,505.85 = 11,225.07/x
  3. Step 3: Cross multiply
    20,656.51x = 28,505.85 × 11,225.07
  4. Step 4: Simplify right side
    20,656.51x = 319,980,289.60
  5. Step 5: Solve for x
    x = 319,980,289.60/20,656.51
  6. Step 6: Final answer
    x = 15,490.53

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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.