Home / 10,621.04-15,900.40-7,447.47

Finding the Fourth Proportional to 10,621.04, 15,900.40 and 7,447.47

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Solution

The fourth proportional to 10,621.04, 15,900.40 and 7,447.47 is: 11,149.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,621.04 : 15,900.40 = 7,447.47 : x
  2. Step 2: Convert to fraction form
    10,621.04/15,900.40 = 7,447.47/x
  3. Step 3: Cross multiply
    10,621.04x = 15,900.40 × 7,447.47
  4. Step 4: Simplify right side
    10,621.04x = 118,417,714.75
  5. Step 5: Solve for x
    x = 118,417,714.75/10,621.04
  6. Step 6: Final answer
    x = 11,149.36

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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.