Home / 15,578.32-21,490.08-10,271.20

Finding the Fourth Proportional to 15,578.32, 21,490.08 and 10,271.20

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Solution

The fourth proportional to 15,578.32, 21,490.08 and 10,271.20 is: 14,168.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,578.32 : 21,490.08 = 10,271.20 : x
  2. Step 2: Convert to fraction form
    15,578.32/21,490.08 = 10,271.20/x
  3. Step 3: Cross multiply
    15,578.32x = 21,490.08 × 10,271.20
  4. Step 4: Simplify right side
    15,578.32x = 220,728,909.70
  5. Step 5: Solve for x
    x = 220,728,909.70/15,578.32
  6. Step 6: Final answer
    x = 14,168.98

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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.