Home / 15,139.04-20,890.26-8,423.60

Finding the Fourth Proportional to 15,139.04, 20,890.26 and 8,423.60

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Solution

The fourth proportional to 15,139.04, 20,890.26 and 8,423.60 is: 11,623.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,139.04 : 20,890.26 = 8,423.60 : x
  2. Step 2: Convert to fraction form
    15,139.04/20,890.26 = 8,423.60/x
  3. Step 3: Cross multiply
    15,139.04x = 20,890.26 × 8,423.60
  4. Step 4: Simplify right side
    15,139.04x = 175,971,194.14
  5. Step 5: Solve for x
    x = 175,971,194.14/15,139.04
  6. Step 6: Final answer
    x = 11,623.67

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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.