Home / 8,918.63-12,307.81-4,939.81

Finding the Fourth Proportional to 8,918.63, 12,307.81 and 4,939.81

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Solution

The fourth proportional to 8,918.63, 12,307.81 and 4,939.81 is: 6,816.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.63 : 12,307.81 = 4,939.81 : x
  2. Step 2: Convert to fraction form
    8,918.63/12,307.81 = 4,939.81/x
  3. Step 3: Cross multiply
    8,918.63x = 12,307.81 × 4,939.81
  4. Step 4: Simplify right side
    8,918.63x = 60,798,181.38
  5. Step 5: Solve for x
    x = 60,798,181.38/8,918.63
  6. Step 6: Final answer
    x = 6,816.99

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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.