Home / 20,685.69-28,552.28-13,516.67

Finding the Fourth Proportional to 20,685.69, 28,552.28 and 13,516.67

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Solution

The fourth proportional to 20,685.69, 28,552.28 and 13,516.67 is: 18,656.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.69 : 28,552.28 = 13,516.67 : x
  2. Step 2: Convert to fraction form
    20,685.69/28,552.28 = 13,516.67/x
  3. Step 3: Cross multiply
    20,685.69x = 28,552.28 × 13,516.67
  4. Step 4: Simplify right side
    20,685.69x = 385,931,536.16
  5. Step 5: Solve for x
    x = 385,931,536.16/20,685.69
  6. Step 6: Final answer
    x = 18,656.93

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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.