Home / 20,865.61-31,112.29-18,547.39

Finding the Fourth Proportional to 20,865.61, 31,112.29 and 18,547.39

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Solution

The fourth proportional to 20,865.61, 31,112.29 and 18,547.39 is: 27,655.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.61 : 31,112.29 = 18,547.39 : x
  2. Step 2: Convert to fraction form
    20,865.61/31,112.29 = 18,547.39/x
  3. Step 3: Cross multiply
    20,865.61x = 31,112.29 × 18,547.39
  4. Step 4: Simplify right side
    20,865.61x = 577,051,776.42
  5. Step 5: Solve for x
    x = 577,051,776.42/20,865.61
  6. Step 6: Final answer
    x = 27,655.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.