Home / 21,011.52-28,995.81-11,580.08

Finding the Fourth Proportional to 21,011.52, 28,995.81 and 11,580.08

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Solution

The fourth proportional to 21,011.52, 28,995.81 and 11,580.08 is: 15,980.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.52 : 28,995.81 = 11,580.08 : x
  2. Step 2: Convert to fraction form
    21,011.52/28,995.81 = 11,580.08/x
  3. Step 3: Cross multiply
    21,011.52x = 28,995.81 × 11,580.08
  4. Step 4: Simplify right side
    21,011.52x = 335,773,799.46
  5. Step 5: Solve for x
    x = 335,773,799.46/21,011.52
  6. Step 6: Final answer
    x = 15,980.46

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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.