Home / 21,430.04-29,576.95-20,483.99

Finding the Fourth Proportional to 21,430.04, 29,576.95 and 20,483.99

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Solution

The fourth proportional to 21,430.04, 29,576.95 and 20,483.99 is: 28,271.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.04 : 29,576.95 = 20,483.99 : x
  2. Step 2: Convert to fraction form
    21,430.04/29,576.95 = 20,483.99/x
  3. Step 3: Cross multiply
    21,430.04x = 29,576.95 × 20,483.99
  4. Step 4: Simplify right side
    21,430.04x = 605,853,989.47
  5. Step 5: Solve for x
    x = 605,853,989.47/21,430.04
  6. Step 6: Final answer
    x = 28,271.25

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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.