Home / 8,638.40-11,916.50-7,457.42

Finding the Fourth Proportional to 8,638.40, 11,916.50 and 7,457.42

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Solution

The fourth proportional to 8,638.40, 11,916.50 and 7,457.42 is: 10,287.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.40 : 11,916.50 = 7,457.42 : x
  2. Step 2: Convert to fraction form
    8,638.40/11,916.50 = 7,457.42/x
  3. Step 3: Cross multiply
    8,638.40x = 11,916.50 × 7,457.42
  4. Step 4: Simplify right side
    8,638.40x = 88,866,345.43
  5. Step 5: Solve for x
    x = 88,866,345.43/8,638.40
  6. Step 6: Final answer
    x = 10,287.36

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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.