Home / 15,437.72-21,312-9,778.39

Finding the Fourth Proportional to 15,437.72, 21,312 and 9,778.39

Calculator

Solution

The fourth proportional to 15,437.72, 21,312 and 9,778.39 is: 13,499.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,437.72 : 21,312 = 9,778.39 : x
  2. Step 2: Convert to fraction form
    15,437.72/21,312 = 9,778.39/x
  3. Step 3: Cross multiply
    15,437.72x = 21,312 × 9,778.39
  4. Step 4: Simplify right side
    15,437.72x = 208,397,047.68
  5. Step 5: Solve for x
    x = 208,397,047.68/15,437.72
  6. Step 6: Final answer
    x = 13,499.21

Related Problems

Find fourth proportional to 7,718.86, 10,656 and 4,889.20
Half scale
Find fourth proportional to 30,875.44, 42,624 and 19,556.78
Double scale
Find fourth proportional to 15,438.72, 21,313.38 and 9,779.39
Similar ratio
Find fourth proportional to 23,156.58, 31,968 and 14,667.59
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.