Home / 15,407.56-21,263.88-9,120.88

Finding the Fourth Proportional to 15,407.56, 21,263.88 and 9,120.88

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Solution

The fourth proportional to 15,407.56, 21,263.88 and 9,120.88 is: 12,587.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,407.56 : 21,263.88 = 9,120.88 : x
  2. Step 2: Convert to fraction form
    15,407.56/21,263.88 = 9,120.88/x
  3. Step 3: Cross multiply
    15,407.56x = 21,263.88 × 9,120.88
  4. Step 4: Simplify right side
    15,407.56x = 193,945,297.81
  5. Step 5: Solve for x
    x = 193,945,297.81/15,407.56
  6. Step 6: Final answer
    x = 12,587.67

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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.