Home / 15,278.80-21,089.16-9,901.06

Finding the Fourth Proportional to 15,278.80, 21,089.16 and 9,901.06

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Solution

The fourth proportional to 15,278.80, 21,089.16 and 9,901.06 is: 13,666.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,278.80 : 21,089.16 = 9,901.06 : x
  2. Step 2: Convert to fraction form
    15,278.80/21,089.16 = 9,901.06/x
  3. Step 3: Cross multiply
    15,278.80x = 21,089.16 × 9,901.06
  4. Step 4: Simplify right side
    15,278.80x = 208,804,956.25
  5. Step 5: Solve for x
    x = 208,804,956.25/15,278.80
  6. Step 6: Final answer
    x = 13,666.32

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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.