Home / 7,916.32-11,875.56-4,218.40

Finding the Fourth Proportional to 7,916.32, 11,875.56 and 4,218.40

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Solution

The fourth proportional to 7,916.32, 11,875.56 and 4,218.40 is: 6,328.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,916.32 : 11,875.56 = 4,218.40 : x
  2. Step 2: Convert to fraction form
    7,916.32/11,875.56 = 4,218.40/x
  3. Step 3: Cross multiply
    7,916.32x = 11,875.56 × 4,218.40
  4. Step 4: Simplify right side
    7,916.32x = 50,095,862.30
  5. Step 5: Solve for x
    x = 50,095,862.30/7,916.32
  6. Step 6: Final answer
    x = 6,328.18

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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.