Home / 10,898.32-15,038.46-6,421.78

Finding the Fourth Proportional to 10,898.32, 15,038.46 and 6,421.78

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Solution

The fourth proportional to 10,898.32, 15,038.46 and 6,421.78 is: 8,861.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,898.32 : 15,038.46 = 6,421.78 : x
  2. Step 2: Convert to fraction form
    10,898.32/15,038.46 = 6,421.78/x
  3. Step 3: Cross multiply
    10,898.32x = 15,038.46 × 6,421.78
  4. Step 4: Simplify right side
    10,898.32x = 96,573,681.66
  5. Step 5: Solve for x
    x = 96,573,681.66/10,898.32
  6. Step 6: Final answer
    x = 8,861.34

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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.