Home / 20,389.71-28,094.65-18,987.19

Finding the Fourth Proportional to 20,389.71, 28,094.65 and 18,987.19

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Solution

The fourth proportional to 20,389.71, 28,094.65 and 18,987.19 is: 26,162.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,389.71 : 28,094.65 = 18,987.19 : x
  2. Step 2: Convert to fraction form
    20,389.71/28,094.65 = 18,987.19/x
  3. Step 3: Cross multiply
    20,389.71x = 28,094.65 × 18,987.19
  4. Step 4: Simplify right side
    20,389.71x = 533,438,457.53
  5. Step 5: Solve for x
    x = 533,438,457.53/20,389.71
  6. Step 6: Final answer
    x = 26,162.14

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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.