Home / 20,315.72-28,038.29-11,363.72

Finding the Fourth Proportional to 20,315.72, 28,038.29 and 11,363.72

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Solution

The fourth proportional to 20,315.72, 28,038.29 and 11,363.72 is: 15,683.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.72 : 28,038.29 = 11,363.72 : x
  2. Step 2: Convert to fraction form
    20,315.72/28,038.29 = 11,363.72/x
  3. Step 3: Cross multiply
    20,315.72x = 28,038.29 × 11,363.72
  4. Step 4: Simplify right side
    20,315.72x = 318,619,276.84
  5. Step 5: Solve for x
    x = 318,619,276.84/20,315.72
  6. Step 6: Final answer
    x = 15,683.39

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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.