Home / 21,368.40-29,488.40-11,937.28

Finding the Fourth Proportional to 21,368.40, 29,488.40 and 11,937.28

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Solution

The fourth proportional to 21,368.40, 29,488.40 and 11,937.28 is: 16,473.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,368.40 : 29,488.40 = 11,937.28 : x
  2. Step 2: Convert to fraction form
    21,368.40/29,488.40 = 11,937.28/x
  3. Step 3: Cross multiply
    21,368.40x = 29,488.40 × 11,937.28
  4. Step 4: Simplify right side
    21,368.40x = 352,011,287.55
  5. Step 5: Solve for x
    x = 352,011,287.55/21,368.40
  6. Step 6: Final answer
    x = 16,473.45

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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.