Home / 21,054.49-29,064.69-13,888.67

Finding the Fourth Proportional to 21,054.49, 29,064.69 and 13,888.67

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Solution

The fourth proportional to 21,054.49, 29,064.69 and 13,888.67 is: 19,172.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,054.49 : 29,064.69 = 13,888.67 : x
  2. Step 2: Convert to fraction form
    21,054.49/29,064.69 = 13,888.67/x
  3. Step 3: Cross multiply
    21,054.49x = 29,064.69 × 13,888.67
  4. Step 4: Simplify right side
    21,054.49x = 403,669,742.74
  5. Step 5: Solve for x
    x = 403,669,742.74/21,054.49
  6. Step 6: Final answer
    x = 19,172.62

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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.