Home / 10,378.90-15,531.90-7,098.40

Finding the Fourth Proportional to 10,378.90, 15,531.90 and 7,098.40

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Solution

The fourth proportional to 10,378.90, 15,531.90 and 7,098.40 is: 10,622.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,378.90 : 15,531.90 = 7,098.40 : x
  2. Step 2: Convert to fraction form
    10,378.90/15,531.90 = 7,098.40/x
  3. Step 3: Cross multiply
    10,378.90x = 15,531.90 × 7,098.40
  4. Step 4: Simplify right side
    10,378.90x = 110,251,638.96
  5. Step 5: Solve for x
    x = 110,251,638.96/10,378.90
  6. Step 6: Final answer
    x = 10,622.67

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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.