Home / 15,490.71-21,377.25-8,416.98

Finding the Fourth Proportional to 15,490.71, 21,377.25 and 8,416.98

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Solution

The fourth proportional to 15,490.71, 21,377.25 and 8,416.98 is: 11,615.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,490.71 : 21,377.25 = 8,416.98 : x
  2. Step 2: Convert to fraction form
    15,490.71/21,377.25 = 8,416.98/x
  3. Step 3: Cross multiply
    15,490.71x = 21,377.25 × 8,416.98
  4. Step 4: Simplify right side
    15,490.71x = 179,931,885.71
  5. Step 5: Solve for x
    x = 179,931,885.71/15,490.71
  6. Step 6: Final answer
    x = 11,615.47

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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.