Home / 15,485.84-21,376.72-9,895.76

Finding the Fourth Proportional to 15,485.84, 21,376.72 and 9,895.76

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Solution

The fourth proportional to 15,485.84, 21,376.72 and 9,895.76 is: 13,660.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.84 : 21,376.72 = 9,895.76 : x
  2. Step 2: Convert to fraction form
    15,485.84/21,376.72 = 9,895.76/x
  3. Step 3: Cross multiply
    15,485.84x = 21,376.72 × 9,895.76
  4. Step 4: Simplify right side
    15,485.84x = 211,538,890.71
  5. Step 5: Solve for x
    x = 211,538,890.71/15,485.84
  6. Step 6: Final answer
    x = 13,660.15

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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.