Home / 13,521.51-18,660.73-7,858.01

Finding the Fourth Proportional to 13,521.51, 18,660.73 and 7,858.01

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Solution

The fourth proportional to 13,521.51, 18,660.73 and 7,858.01 is: 10,844.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,521.51 : 18,660.73 = 7,858.01 : x
  2. Step 2: Convert to fraction form
    13,521.51/18,660.73 = 7,858.01/x
  3. Step 3: Cross multiply
    13,521.51x = 18,660.73 × 7,858.01
  4. Step 4: Simplify right side
    13,521.51x = 146,636,244.69
  5. Step 5: Solve for x
    x = 146,636,244.69/13,521.51
  6. Step 6: Final answer
    x = 10,844.67

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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.