Home / 19,870.95-27,422.60-10,918.79

Finding the Fourth Proportional to 19,870.95, 27,422.60 and 10,918.79

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Solution

The fourth proportional to 19,870.95, 27,422.60 and 10,918.79 is: 15,068.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,870.95 : 27,422.60 = 10,918.79 : x
  2. Step 2: Convert to fraction form
    19,870.95/27,422.60 = 10,918.79/x
  3. Step 3: Cross multiply
    19,870.95x = 27,422.60 × 10,918.79
  4. Step 4: Simplify right side
    19,870.95x = 299,421,418.95
  5. Step 5: Solve for x
    x = 299,421,418.95/19,870.95
  6. Step 6: Final answer
    x = 15,068.30

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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.