Home / 20,931.86-28,886.63-11,500.62

Finding the Fourth Proportional to 20,931.86, 28,886.63 and 11,500.62

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Solution

The fourth proportional to 20,931.86, 28,886.63 and 11,500.62 is: 15,871.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.86 : 28,886.63 = 11,500.62 : x
  2. Step 2: Convert to fraction form
    20,931.86/28,886.63 = 11,500.62/x
  3. Step 3: Cross multiply
    20,931.86x = 28,886.63 × 11,500.62
  4. Step 4: Simplify right side
    20,931.86x = 332,214,154.71
  5. Step 5: Solve for x
    x = 332,214,154.71/20,931.86
  6. Step 6: Final answer
    x = 15,871.22

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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.