Home / 15,639.84-21,574.80-9,669.60

Finding the Fourth Proportional to 15,639.84, 21,574.80 and 9,669.60

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Solution

The fourth proportional to 15,639.84, 21,574.80 and 9,669.60 is: 13,338.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,639.84 : 21,574.80 = 9,669.60 : x
  2. Step 2: Convert to fraction form
    15,639.84/21,574.80 = 9,669.60/x
  3. Step 3: Cross multiply
    15,639.84x = 21,574.80 × 9,669.60
  4. Step 4: Simplify right side
    15,639.84x = 208,619,686.08
  5. Step 5: Solve for x
    x = 208,619,686.08/15,639.84
  6. Step 6: Final answer
    x = 13,338.99

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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.