Home / 30,885.13-42,626.05-19,555.67

Finding the Fourth Proportional to 30,885.13, 42,626.05 and 19,555.67

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Solution

The fourth proportional to 30,885.13, 42,626.05 and 19,555.67 is: 26,989.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,885.13 : 42,626.05 = 19,555.67 : x
  2. Step 2: Convert to fraction form
    30,885.13/42,626.05 = 19,555.67/x
  3. Step 3: Cross multiply
    30,885.13x = 42,626.05 × 19,555.67
  4. Step 4: Simplify right side
    30,885.13x = 833,580,869.43
  5. Step 5: Solve for x
    x = 833,580,869.43/30,885.13
  6. Step 6: Final answer
    x = 26,989.72

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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.