Home / 13,428.72-20,113.64-9,521.28

Finding the Fourth Proportional to 13,428.72, 20,113.64 and 9,521.28

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Solution

The fourth proportional to 13,428.72, 20,113.64 and 9,521.28 is: 14,261.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.72 : 20,113.64 = 9,521.28 : x
  2. Step 2: Convert to fraction form
    13,428.72/20,113.64 = 9,521.28/x
  3. Step 3: Cross multiply
    13,428.72x = 20,113.64 × 9,521.28
  4. Step 4: Simplify right side
    13,428.72x = 191,507,598.26
  5. Step 5: Solve for x
    x = 191,507,598.26/13,428.72
  6. Step 6: Final answer
    x = 14,261.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.