Home / 15,503.70-21,395.10-8,430.12

Finding the Fourth Proportional to 15,503.70, 21,395.10 and 8,430.12

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Solution

The fourth proportional to 15,503.70, 21,395.10 and 8,430.12 is: 11,633.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.70 : 21,395.10 = 8,430.12 : x
  2. Step 2: Convert to fraction form
    15,503.70/21,395.10 = 8,430.12/x
  3. Step 3: Cross multiply
    15,503.70x = 21,395.10 × 8,430.12
  4. Step 4: Simplify right side
    15,503.70x = 180,363,260.41
  5. Step 5: Solve for x
    x = 180,363,260.41/15,503.70
  6. Step 6: Final answer
    x = 11,633.56

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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.