Home / 12,888.40-19,332.60-9,972.40

Finding the Fourth Proportional to 12,888.40, 19,332.60 and 9,972.40

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Solution

The fourth proportional to 12,888.40, 19,332.60 and 9,972.40 is: 14,958.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,888.40 : 19,332.60 = 9,972.40 : x
  2. Step 2: Convert to fraction form
    12,888.40/19,332.60 = 9,972.40/x
  3. Step 3: Cross multiply
    12,888.40x = 19,332.60 × 9,972.40
  4. Step 4: Simplify right side
    12,888.40x = 192,792,420.24
  5. Step 5: Solve for x
    x = 192,792,420.24/12,888.40
  6. Step 6: Final answer
    x = 14,958.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.