Home / 21,491.04-29,659.40-11,931.51

Finding the Fourth Proportional to 21,491.04, 29,659.40 and 11,931.51

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Solution

The fourth proportional to 21,491.04, 29,659.40 and 11,931.51 is: 16,466.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,491.04 : 29,659.40 = 11,931.51 : x
  2. Step 2: Convert to fraction form
    21,491.04/29,659.40 = 11,931.51/x
  3. Step 3: Cross multiply
    21,491.04x = 29,659.40 × 11,931.51
  4. Step 4: Simplify right side
    21,491.04x = 353,881,427.69
  5. Step 5: Solve for x
    x = 353,881,427.69/21,491.04
  6. Step 6: Final answer
    x = 16,466.46

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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.