Home / 13,947.51-19,218.95-12,963.09

Finding the Fourth Proportional to 13,947.51, 19,218.95 and 12,963.09

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Solution

The fourth proportional to 13,947.51, 19,218.95 and 12,963.09 is: 17,862.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,947.51 : 19,218.95 = 12,963.09 : x
  2. Step 2: Convert to fraction form
    13,947.51/19,218.95 = 12,963.09/x
  3. Step 3: Cross multiply
    13,947.51x = 19,218.95 × 12,963.09
  4. Step 4: Simplify right side
    13,947.51x = 249,136,913.74
  5. Step 5: Solve for x
    x = 249,136,913.74/13,947.51
  6. Step 6: Final answer
    x = 17,862.47

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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.