Home / 20,935.40-28,892.45-11,985.71

Finding the Fourth Proportional to 20,935.40, 28,892.45 and 11,985.71

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Solution

The fourth proportional to 20,935.40, 28,892.45 and 11,985.71 is: 16,541.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.40 : 28,892.45 = 11,985.71 : x
  2. Step 2: Convert to fraction form
    20,935.40/28,892.45 = 11,985.71/x
  3. Step 3: Cross multiply
    20,935.40x = 28,892.45 × 11,985.71
  4. Step 4: Simplify right side
    20,935.40x = 346,296,412.39
  5. Step 5: Solve for x
    x = 346,296,412.39/20,935.40
  6. Step 6: Final answer
    x = 16,541.19

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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.