Home / 21,929.10-30,261.02-12,368.70

Finding the Fourth Proportional to 21,929.10, 30,261.02 and 12,368.70

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Solution

The fourth proportional to 21,929.10, 30,261.02 and 12,368.70 is: 17,068.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,929.10 : 30,261.02 = 12,368.70 : x
  2. Step 2: Convert to fraction form
    21,929.10/30,261.02 = 12,368.70/x
  3. Step 3: Cross multiply
    21,929.10x = 30,261.02 × 12,368.70
  4. Step 4: Simplify right side
    21,929.10x = 374,289,478.07
  5. Step 5: Solve for x
    x = 374,289,478.07/21,929.10
  6. Step 6: Final answer
    x = 17,068.16

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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.