Home / 12,838.45-19,288.79-12,130.40

Finding the Fourth Proportional to 12,838.45, 19,288.79 and 12,130.40

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Solution

The fourth proportional to 12,838.45, 19,288.79 and 12,130.40 is: 18,225.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,838.45 : 19,288.79 = 12,130.40 : x
  2. Step 2: Convert to fraction form
    12,838.45/19,288.79 = 12,130.40/x
  3. Step 3: Cross multiply
    12,838.45x = 19,288.79 × 12,130.40
  4. Step 4: Simplify right side
    12,838.45x = 233,980,738.22
  5. Step 5: Solve for x
    x = 233,980,738.22/12,838.45
  6. Step 6: Final answer
    x = 18,225.00

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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.