Home / 20,064.79-27,688.64-10,990.01

Finding the Fourth Proportional to 20,064.79, 27,688.64 and 10,990.01

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Solution

The fourth proportional to 20,064.79, 27,688.64 and 10,990.01 is: 15,165.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,064.79 : 27,688.64 = 10,990.01 : x
  2. Step 2: Convert to fraction form
    20,064.79/27,688.64 = 10,990.01/x
  3. Step 3: Cross multiply
    20,064.79x = 27,688.64 × 10,990.01
  4. Step 4: Simplify right side
    20,064.79x = 304,298,319.52
  5. Step 5: Solve for x
    x = 304,298,319.52/20,064.79
  6. Step 6: Final answer
    x = 15,165.79

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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.