Home / 8,421.47-11,621.63-5,064.32

Finding the Fourth Proportional to 8,421.47, 11,621.63 and 5,064.32

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Solution

The fourth proportional to 8,421.47, 11,621.63 and 5,064.32 is: 6,988.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.47 : 11,621.63 = 5,064.32 : x
  2. Step 2: Convert to fraction form
    8,421.47/11,621.63 = 5,064.32/x
  3. Step 3: Cross multiply
    8,421.47x = 11,621.63 × 5,064.32
  4. Step 4: Simplify right side
    8,421.47x = 58,855,607.79
  5. Step 5: Solve for x
    x = 58,855,607.79/8,421.47
  6. Step 6: Final answer
    x = 6,988.76

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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.