Home / 15,482.40-21,357.72-9,807.60

Finding the Fourth Proportional to 15,482.40, 21,357.72 and 9,807.60

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Solution

The fourth proportional to 15,482.40, 21,357.72 and 9,807.60 is: 13,529.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,482.40 : 21,357.72 = 9,807.60 : x
  2. Step 2: Convert to fraction form
    15,482.40/21,357.72 = 9,807.60/x
  3. Step 3: Cross multiply
    15,482.40x = 21,357.72 × 9,807.60
  4. Step 4: Simplify right side
    15,482.40x = 209,467,974.67
  5. Step 5: Solve for x
    x = 209,467,974.67/15,482.40
  6. Step 6: Final answer
    x = 13,529.43

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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.