Home / 21,478.10-29,626.10-15,518.52

Finding the Fourth Proportional to 21,478.10, 29,626.10 and 15,518.52

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Solution

The fourth proportional to 21,478.10, 29,626.10 and 15,518.52 is: 21,405.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,478.10 : 29,626.10 = 15,518.52 : x
  2. Step 2: Convert to fraction form
    21,478.10/29,626.10 = 15,518.52/x
  3. Step 3: Cross multiply
    21,478.10x = 29,626.10 × 15,518.52
  4. Step 4: Simplify right side
    21,478.10x = 459,753,225.37
  5. Step 5: Solve for x
    x = 459,753,225.37/21,478.10
  6. Step 6: Final answer
    x = 21,405.67

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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.