Home / 42,478.54-63,715.38-20,307.22

Finding the Fourth Proportional to 42,478.54, 63,715.38 and 20,307.22

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Solution

The fourth proportional to 42,478.54, 63,715.38 and 20,307.22 is: 30,459.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,478.54 : 63,715.38 = 20,307.22 : x
  2. Step 2: Convert to fraction form
    42,478.54/63,715.38 = 20,307.22/x
  3. Step 3: Cross multiply
    42,478.54x = 63,715.38 × 20,307.22
  4. Step 4: Simplify right side
    42,478.54x = 1,293,882,239.04
  5. Step 5: Solve for x
    x = 1,293,882,239.04/42,478.54
  6. Step 6: Final answer
    x = 30,459.67

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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.