Home / 18,688.32-28,031.40-7,000.74

Finding the Fourth Proportional to 18,688.32, 28,031.40 and 7,000.74

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Solution

The fourth proportional to 18,688.32, 28,031.40 and 7,000.74 is: 10,500.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,688.32 : 28,031.40 = 7,000.74 : x
  2. Step 2: Convert to fraction form
    18,688.32/28,031.40 = 7,000.74/x
  3. Step 3: Cross multiply
    18,688.32x = 28,031.40 × 7,000.74
  4. Step 4: Simplify right side
    18,688.32x = 196,240,543.24
  5. Step 5: Solve for x
    x = 196,240,543.24/18,688.32
  6. Step 6: Final answer
    x = 10,500.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.