Home / 20,539.10-28,346.13-12,472.72

Finding the Fourth Proportional to 20,539.10, 28,346.13 and 12,472.72

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Solution

The fourth proportional to 20,539.10, 28,346.13 and 12,472.72 is: 17,213.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,539.10 : 28,346.13 = 12,472.72 : x
  2. Step 2: Convert to fraction form
    20,539.10/28,346.13 = 12,472.72/x
  3. Step 3: Cross multiply
    20,539.10x = 28,346.13 × 12,472.72
  4. Step 4: Simplify right side
    20,539.10x = 353,553,271.71
  5. Step 5: Solve for x
    x = 353,553,271.71/20,539.10
  6. Step 6: Final answer
    x = 17,213.67

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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.