Home / 20,926.83-28,885.43-12,430.34

Finding the Fourth Proportional to 20,926.83, 28,885.43 and 12,430.34

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Solution

The fourth proportional to 20,926.83, 28,885.43 and 12,430.34 is: 17,157.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,926.83 : 28,885.43 = 12,430.34 : x
  2. Step 2: Convert to fraction form
    20,926.83/28,885.43 = 12,430.34/x
  3. Step 3: Cross multiply
    20,926.83x = 28,885.43 × 12,430.34
  4. Step 4: Simplify right side
    20,926.83x = 359,055,715.95
  5. Step 5: Solve for x
    x = 359,055,715.95/20,926.83
  6. Step 6: Final answer
    x = 17,157.67

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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.