Home / 20,762.10-28,656.28-13,206.96

Finding the Fourth Proportional to 20,762.10, 28,656.28 and 13,206.96

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Solution

The fourth proportional to 20,762.10, 28,656.28 and 13,206.96 is: 18,228.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,762.10 : 28,656.28 = 13,206.96 : x
  2. Step 2: Convert to fraction form
    20,762.10/28,656.28 = 13,206.96/x
  3. Step 3: Cross multiply
    20,762.10x = 28,656.28 × 13,206.96
  4. Step 4: Simplify right side
    20,762.10x = 378,462,343.71
  5. Step 5: Solve for x
    x = 378,462,343.71/20,762.10
  6. Step 6: Final answer
    x = 18,228.52

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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.