Home / 13,700.40-20,533.56-7,122.72

Finding the Fourth Proportional to 13,700.40, 20,533.56 and 7,122.72

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Solution

The fourth proportional to 13,700.40, 20,533.56 and 7,122.72 is: 10,675.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,700.40 : 20,533.56 = 7,122.72 : x
  2. Step 2: Convert to fraction form
    13,700.40/20,533.56 = 7,122.72/x
  3. Step 3: Cross multiply
    13,700.40x = 20,533.56 × 7,122.72
  4. Step 4: Simplify right side
    13,700.40x = 146,254,798.48
  5. Step 5: Solve for x
    x = 146,254,798.48/13,700.40
  6. Step 6: Final answer
    x = 10,675.22

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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.