Home / 20,268.42-27,970.88-12,715.06

Finding the Fourth Proportional to 20,268.42, 27,970.88 and 12,715.06

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Solution

The fourth proportional to 20,268.42, 27,970.88 and 12,715.06 is: 17,547.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,268.42 : 27,970.88 = 12,715.06 : x
  2. Step 2: Convert to fraction form
    20,268.42/27,970.88 = 12,715.06/x
  3. Step 3: Cross multiply
    20,268.42x = 27,970.88 × 12,715.06
  4. Step 4: Simplify right side
    20,268.42x = 355,651,417.45
  5. Step 5: Solve for x
    x = 355,651,417.45/20,268.42
  6. Step 6: Final answer
    x = 17,547.07

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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.