Home / 21,005.91-28,988.76-12,055.01

Finding the Fourth Proportional to 21,005.91, 28,988.76 and 12,055.01

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Solution

The fourth proportional to 21,005.91, 28,988.76 and 12,055.01 is: 16,636.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.91 : 28,988.76 = 12,055.01 : x
  2. Step 2: Convert to fraction form
    21,005.91/28,988.76 = 12,055.01/x
  3. Step 3: Cross multiply
    21,005.91x = 28,988.76 × 12,055.01
  4. Step 4: Simplify right side
    21,005.91x = 349,459,646.74
  5. Step 5: Solve for x
    x = 349,459,646.74/21,005.91
  6. Step 6: Final answer
    x = 16,636.25

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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.