Home / 12,970.07-19,478.59-11,928.20

Finding the Fourth Proportional to 12,970.07, 19,478.59 and 11,928.20

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Solution

The fourth proportional to 12,970.07, 19,478.59 and 11,928.20 is: 17,913.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,970.07 : 19,478.59 = 11,928.20 : x
  2. Step 2: Convert to fraction form
    12,970.07/19,478.59 = 11,928.20/x
  3. Step 3: Cross multiply
    12,970.07x = 19,478.59 × 11,928.20
  4. Step 4: Simplify right side
    12,970.07x = 232,344,536.11
  5. Step 5: Solve for x
    x = 232,344,536.11/12,970.07
  6. Step 6: Final answer
    x = 17,913.91

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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.