Home / 8,916.10-12,307.45-5,190.10

Finding the Fourth Proportional to 8,916.10, 12,307.45 and 5,190.10

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Solution

The fourth proportional to 8,916.10, 12,307.45 and 5,190.10 is: 7,164.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,916.10 : 12,307.45 = 5,190.10 : x
  2. Step 2: Convert to fraction form
    8,916.10/12,307.45 = 5,190.10/x
  3. Step 3: Cross multiply
    8,916.10x = 12,307.45 × 5,190.10
  4. Step 4: Simplify right side
    8,916.10x = 63,876,852.50
  5. Step 5: Solve for x
    x = 63,876,852.50/8,916.10
  6. Step 6: Final answer
    x = 7,164.22

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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.