Home / 21,429.04-29,575.02-12,931.60

Finding the Fourth Proportional to 21,429.04, 29,575.02 and 12,931.60

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Solution

The fourth proportional to 21,429.04, 29,575.02 and 12,931.60 is: 17,847.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,429.04 : 29,575.02 = 12,931.60 : x
  2. Step 2: Convert to fraction form
    21,429.04/29,575.02 = 12,931.60/x
  3. Step 3: Cross multiply
    21,429.04x = 29,575.02 × 12,931.60
  4. Step 4: Simplify right side
    21,429.04x = 382,452,328.63
  5. Step 5: Solve for x
    x = 382,452,328.63/21,429.04
  6. Step 6: Final answer
    x = 17,847.39

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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.