Home / 20,415.65-28,109.16-18,547.11

Finding the Fourth Proportional to 20,415.65, 28,109.16 and 18,547.11

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Solution

The fourth proportional to 20,415.65, 28,109.16 and 18,547.11 is: 25,536.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.65 : 28,109.16 = 18,547.11 : x
  2. Step 2: Convert to fraction form
    20,415.65/28,109.16 = 18,547.11/x
  3. Step 3: Cross multiply
    20,415.65x = 28,109.16 × 18,547.11
  4. Step 4: Simplify right side
    20,415.65x = 521,343,682.53
  5. Step 5: Solve for x
    x = 521,343,682.53/20,415.65
  6. Step 6: Final answer
    x = 25,536.48

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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.