Home / 10,215.30-14,106.06-6,445.20

Finding the Fourth Proportional to 10,215.30, 14,106.06 and 6,445.20

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Solution

The fourth proportional to 10,215.30, 14,106.06 and 6,445.20 is: 8,900.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,215.30 : 14,106.06 = 6,445.20 : x
  2. Step 2: Convert to fraction form
    10,215.30/14,106.06 = 6,445.20/x
  3. Step 3: Cross multiply
    10,215.30x = 14,106.06 × 6,445.20
  4. Step 4: Simplify right side
    10,215.30x = 90,916,377.91
  5. Step 5: Solve for x
    x = 90,916,377.91/10,215.30
  6. Step 6: Final answer
    x = 8,900.02

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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.