Home / 15,528.99-21,427.16-9,157.58

Finding the Fourth Proportional to 15,528.99, 21,427.16 and 9,157.58

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Solution

The fourth proportional to 15,528.99, 21,427.16 and 9,157.58 is: 12,635.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.99 : 21,427.16 = 9,157.58 : x
  2. Step 2: Convert to fraction form
    15,528.99/21,427.16 = 9,157.58/x
  3. Step 3: Cross multiply
    15,528.99x = 21,427.16 × 9,157.58
  4. Step 4: Simplify right side
    15,528.99x = 196,220,931.87
  5. Step 5: Solve for x
    x = 196,220,931.87/15,528.99
  6. Step 6: Final answer
    x = 12,635.78

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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.