Home / 20,318.32-28,041.61-11,368.09

Finding the Fourth Proportional to 20,318.32, 28,041.61 and 11,368.09

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Solution

The fourth proportional to 20,318.32, 28,041.61 and 11,368.09 is: 15,689.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,318.32 : 28,041.61 = 11,368.09 : x
  2. Step 2: Convert to fraction form
    20,318.32/28,041.61 = 11,368.09/x
  3. Step 3: Cross multiply
    20,318.32x = 28,041.61 × 11,368.09
  4. Step 4: Simplify right side
    20,318.32x = 318,779,419.28
  5. Step 5: Solve for x
    x = 318,779,419.28/20,318.32
  6. Step 6: Final answer
    x = 15,689.26

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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.