Home / 30,615.71-42,258.48-18,516.20

Finding the Fourth Proportional to 30,615.71, 42,258.48 and 18,516.20

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Solution

The fourth proportional to 30,615.71, 42,258.48 and 18,516.20 is: 25,557.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,615.71 : 42,258.48 = 18,516.20 : x
  2. Step 2: Convert to fraction form
    30,615.71/42,258.48 = 18,516.20/x
  3. Step 3: Cross multiply
    30,615.71x = 42,258.48 × 18,516.20
  4. Step 4: Simplify right side
    30,615.71x = 782,466,186.65
  5. Step 5: Solve for x
    x = 782,466,186.65/30,615.71
  6. Step 6: Final answer
    x = 25,557.67

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Double scale
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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.